Black Algae and How To Get Rid Of It

[@justbumpit5231]

I have had several spots of black algae on steps and in my spa. To ensure the TriChlor gets on those spots, i use a length of PVC pipe and a funnel. I set the pipe on the spot and pour the chemical down the pipe through the funnel for exact treatment. Works like a charm.

[@PoolSchooler]

That's a GREAT idea!!! Thanks for sharing.

[@pgnandt]

Ha! Easier yet is just use your pool pole (elipti-lok). Small funnel. Rinse the pole in the pool. Done this a hundred times for small spots.

[@PoolSchooler]

@@pgnandt fantastic. Thanks for the time and money saving tip.

[@rockstar2923]

@@pgnandt genius idea! Thank you!

[@Fishingjunkie-y8v]

Glad i came across your video because im researching how to fight it. I got some spot with black algae

[@PoolSchooler]

@@Fishingjunkie-y8v glad you found my video. I hope it was helpful. Thanks for commenting.

[@eliaolivo5924]

Thanks a lot for all the videos you upload in youtube, you are amazing, you helped me to saved hundreds of dollars 🎉🎉🎉

[@PoolSchooler]

I am delighted to hear that. That's the reason I started and continue to post on this channel. Hope you'll subscribe to and share my channel with everyone.

[@djfrich6126]

@pool school we have an ecosmarte pool that uses copper infusion and has glass pack media in a sand type filter. We are in Florida and have had the pool for 5 years. Our previous pool experience in Minnesota was an in ground vinyl pool. This year in Florida we have had black algae. By the time we realized what it was we had it in a number of areas in the pool. We researched and tried different methods to clear it with no success. We followed your method step by step and are pleased to let you know that it has cleared the black algae on the bottom of the pool. We are dealing with some areas on the sides of the pool and we are treating that as well. Thank you for this great video.

[@PoolSchooler]

DJ Frich I am so glad that it was helpful. The black algae on the sides is a bit trickier because you usually have to put the Trichlor granules in some kind of fabric pouch like a nylon and dangle it from the edge of the pool so it comes in contact with the black algae spot A little trickier but it does the trick.

[@djfrich6126]

@@PoolSchooler We have also found that we have a low calcium issue which we were not aware of and it has caused some etching on the pool surface in particular the walls and some of the bottom surface area. We think because of the etched surface we were more prone to the black algae which we have cleared up with the Trichlor solution from you. My question is because of the etched surface will we be more prone to black algae because it is easy to attach to the etched surface? Secondly if there is a lot of etched areas do you recommend resurfacing the pool to prevent continued issues caused by the etched areas? Any help would be appreciated. Thanks

[@PoolSchooler]

@@djfrich6126 So with low calcium you may need to add some to get your water hardness up to the ideal level which would be 250-500ppm. Definitely any porousness in your tile or even plaster will provide a better place for algae growth of any type BUT if you keep your phosphates down, your filter clean and operating properly and long enough each day, and chemistry in the ideal range you shouldn't have any problem with black or any other type of algae.

[@jrbotello3888]

Thank you for the video and help i am going to try this I just built my first pool and need to do this already. But I am excited to maintain my pool in good order Im learning.

[@PoolSchooler]

Keep those phosphates down. That's super helpful to prevent further growth.

[@cherymelanie]

How do you figure the amount of water in a 20x40 pool. Everyone keeps telling us we have a huge pool! Lol We just bought the home so very new at this, I appreciate all your videos... it has helped us immensely Huge Thank You!!

[@PoolSchooler]

Hmm. There are several pool volume calculators on the web. Try this link. It's pretty plug and calculate. www.swimmingpool.com/maintenance/water-care/pool-volume-calculator/

[@terrypapineau6993]

I put the granules in a lady’s nylon and just lay it on the stain I also lower the ph to about 7.2 prior to dealing with any algae

[@shawnm2597]

Thanks for your instructions about black algae. I'm a long time pool owner, but new at taking care of it. My pool guy was hospitalized and I am now on my own. A steep learning curve and its a little more than what my pool guy made it look like. My pump impeller destroyed itself and it took longer than expected to get a new impeller, diffuser and some seals in, so it was down for about 2 weeks. I believe that's why I am seeing the black spots which look to be black algae. I was able to get some of one of them off by just plastic brushing (really hard) on the steps, but there are more popping up on the bottom in the shallow and deep side. So scrubbing with a plastic brush doesn't seem to work. I was going to get a metal one but worried about damaging the plaster... (any advice on this would be appreciated). I'm going to try your chemical way to get rid of it first and it looks like I am going to try to find a combo brush. Hoping it wont scratch the plaster. My pool guy said a metal brush is ok to use. Your info on the hard outer shell on the black algae makes sense as to why it won't just scrub off. Thanks for that tid-bit of info. Thanks again for this post and I have become a new subscriber to your channel.

[@PoolSchooler]

I would never recommend using a wire brush on a plaster cool it’s just too abrasive, so I would respectfully disagree with your pool guy. With regards to the black algae spots. If you treat them the way I described in this video it should take care of them. Note that you want to keep your phosphate levels down in your pool because that will feed algae and also keep your filter media clean.

[@jamesnicol1688]

Hi. After you add the phosphate eliminator to the pool, how many hours should you filter for? Thanks and very helpful advice

[@PoolSchooler]

@@jamesnicol1688 the cloudiness of the phosphate remover, which is evidence that it’s working should dissipate in a few hours. So probably run your pool pump for 2 to 4 hours till it clears up.

[@florin12345]

You mentioned that you shouldn't use this method of you have a black or dark bottom pool, what is the alternative if you do?

[@PoolSchooler]

Hmm. Not sure, but if you have a black bottom pool you probably won't be a able to see the black algae. You can try treating the phosphates, and adding the trichlor granules dissolved to up the chlorine and then scrub the affected area with your pool brush to 'break the surface/skin' of the algae. See if that works.

[@shakespeare127]

Thank you so much. This algae destroyer works excellently.

[@PoolSchooler]

Glad to hear it. Hope you'll subscribe to my channel.

[@Airwrek1]

Great info but then What is the treatment plan for Black Algae especially on walls & in a fiberglass lined pool? Seems like various videos say the same thing as this. Dont use this treatment on vinyl, fiberglass, painted surfaces, etc. but seem to avoid talking about what you should do to treat black algae in those situations. Like I mentioned, on walls in a fiberglass lined pool or surfaces prone to discoloration or dislodging, what would be the recommendation?

[@PoolSchooler]

Yeah, fiberglass pools are a bit difficult because having the granules sit directly on contact with the fiberglass can damage it or at least discolor it. To be honest with you I really don’t know except if you keep your phosphate levels low in your pool and keep your pool chemistry in the ideal range specifically chlorine, and keep your filter media clean. You should never have a problem with black algae, or any algae.

[@Airwrek1]

@@PoolSchoolerThanks for the reply. I did have another question then. If I Don’t use Tri Chlor(though the pool supply sold it to me anyway & guy said he’s a chemistry guy after I told him I have a fiberglass lined pool) should I just use shock & the phosphates? And can I apply them at the same time? Ive learned certain chemicals mixed Can be dangerous & even explosive. Some videos out there say to dilute shock before adding to pool, but the brand I bought says in the directions to Never do that w/ that brand. They sold me GLB brand pool shock which they said is also more potent. I’ve watched some of your vids, where in some treatment cases you keep the equipment running & in others like this treatment you don’t until later. I have a fiberglass lined pool but yet it also seems like I’m getting that “powdering off” effect when I brush the pool. I really need to get it re surfaced but can’t afford that rt now. I’ve got a bunch of stubborn algae patches w/ limited treatment choices it seems. So if my main choices are brushing, pool shock, phosphates remover, chemistry mainly chlorine & cleaning filter, my questions are should I use pool shock & phosphates remover at the same time or shock one day & then phos remover the next & leave the pool equipment running? Just to say, reading all these warning labels on these chemicals makes me anxious. I’ve recently had respiratory issues for a different reason, but last thing I’ll mention is , as I’ve been learning all this a while ago I was adding acid to my pool, which happened to be at night, only because I’m kind of a night owl & what I saw freaked me out. After pouring it into the pool I saw an acid cloud floating above pool! And I ran the other way. If it wasn’t night time I would never have seen it & might’ve inhaled it. And a pool guy said yep if you’re breathing it it’s acid & you could “dry drown” & you wouldn’t know why. I said don’t they tell this to customers!? In the day time you’ll never see this or where it is. Crazy. So I know virtually nobody does & I grew up w/ a pool but I wear a respirator & gloves when I’m dealing w/ anything beyond liquid chlorine. Any ways long message but important stuff I’m trying to learn here & really do appreciate your info! & any feedback you can offer

[@PoolSchooler]

@@Airwrek1 First off I'm not a doctor or a chemist so it's hard for me to comment or advise based on your respiratory issues. But shock is typically chlorine (TriChlor or DiChlor and sometimes Calcium HypoChlorite which is still a poison) which is why all three of them kill bacteria. But unless you have a salt pool you can't do without one of them in your pool water. Also, re: the chemicals blowing up, that certainly is a concern when you are combining them in a bucket, but typically in a large body of water like a pool it's too diluted for it to be explosive. BUT I WOULD NEVER MIX ANY CHEMICALS IN A BUCKET BEFORE ADDING TO A POOL. Unless the directions say to do so. Honestly I'd say follow the manufacturer's instructions to insure the most safety. As far as the Algae, it sounds like the shock and phosphate remover are the best you can do for now. AND your aging fiberglass may also be causing the black algae to adhere to it (the surface as it ages gets more pitted and rough allowing for algae to attach to it and grow) so until you're able redo that you may have a bit of a battle on your hands. My best suggestion would be maintain proper chlorine levels, keep phosphates down AND KEEP YOU FILTER MEDIA REALLY REALLY CLEAN. If that means cleaning cartridges more often then do it, or backwashing (if applicable) more then do it. Also make sure you run your filter motor long enough to insure ideal filtration of the water. Those are the best ways to prevent any type of algae and "an once of prevention is worth a pound of cure"

[@myvid222]

Do you need to wait a period of time after pouring in the Phosphate Remover before starting your pool pump?

[@PoolSchooler]

@@myvid222 no not at all. In fact, it’s a good idea to run the filter pump when you add the product to Help “mix it in“ and distribute.

[@19boggsy]

I can see this is an older video, but is Orenda the best PR remover? I ended up buying Crystal Clarity 10000 before i watched this video.

[@PoolSchooler]

I can only speak on my own personal experience over 20+ years of doing this and at least a half a dozen products I've used. YES, in my opinion AND PERSONAL EXPERIENCE it's the best I've ever used. Hope you'll subscribe and please check out my website poolschooler.com

[@davidcook521]

Hello Kenny, How should I treat the filter after treating the pool for black algae. Should I put Tri Chlor directly into the intake then wait a moment and turn off the filter and let it sit in there for awhile.?

[@Jbyrd75901]

Dead on. I had black and green algae. Over about a month, I got the levels right, super cleansed the filters (cartridge) increased run time to 12 hours, finally added the phosphate remover (32 oz in roughly 28k gallon) and it was GONE in 3 days (Beijing at least once a day). My pressure only went up 3 psi.

[@PoolSchooler]

Jason Burson way to go!!! Success!!!

[@Jbyrd75901]

Pool School I’m now thinking 32oz phosphate remover was a bit much. I now have test strips-

[@PoolSchooler]

Jason Burson oh wow! Yeah that may have been much. It really depends on the labels instructions. But if it was PR10000 then yeah that’s a bit much.

[@rockridge2376]

I believe my inground pool surface is plaster. It is very porous and does seem to brush away bits of it when scrubbing for black algae. Is there a method to rid the black algae for my pool? If not, and I should look into resurfacing the pool. What is a good recommendation for a surface that is not so porous but would also still provide grip? Thx.

[@PoolSchooler]

Based on what you’re saying, it sounds like your Plaster is quite old and is in need of resurfacing. I would recommend switching to a pebble tech surface. It’s more durable than plaster.

[@jameslucas5171]

Hi Kenny. I had my pool re-plastered (white plaster) 16 months ago. Recently I have noticed a couple darker stains. Not very big, maybe the size of a baseball or golf ball. I am assuming they are organic in nature. Maybe duck poop that was not removed right away? A leaf? It is in the deep end, so I cannot reach it by hand. I have tried to remove it with a wire brush attached to the end of a pole without success. Should I dive down and try to remove with a pumice stone? Purchase an attachment that holds a stick of pumice stone to the end of a pole? Or buy a "Stain Eraser" online for about $25. Do you have any recommendations?

[@PoolSchooler]

Sorry for the delayed response unfortunately I don’t. You might wanna treat it as if it was black algae according to the video but just don’t leave it on to long.

[@dfrank-fm9pz]

I had black algae on the wall. Therefore, pouring the tri-chlor granules over the algae area will sink to the bottom. How do you resolve removing black algae on walls?

[@PoolSchooler]

The sides are a bit more tricky, but not impossible. Get something like a nylon stocking (cut it just above the ankle. Pour the TriChlor into the stocking (tie the end off with some string then dangle the string to where it is contacting the affected side where the black algae is. Secure the string at that length (like with a rock or brick) and leave it undisturbed for a couple of hours. Then move it and brush the area. That should do it. I know it's a bit of a pain but this is what has worked best for me.

[@billschroedel5249]

In the off-season of AZ, how often do you recommend brushing the pool? Thank you for all of your vids. I have truly found them very helpful.

[@PoolSchooler]

I still do it weekly, BUT you can probably do it every two weeks.

[@CP-nf9my]

What if it's on the sides of the pool?

[@julianneheinick2998]

Do you have any videos or tips on Yellow algae? We are dealing with alot of Yellow algae growth here in NJ. Pool stores are the worst on tips offering yellow out etc etc. Can you do a video on yellow algae if you dont already have one. Please please please

[@PoolSchooler]

Julianne Heinick I did one on algae and algaecides and it’s for all types of algae including yellow or mustard algae. kzbin.info/www/bejne/g6uqoH5qeMlqqsU

[@jmackinjersey1]

OK, I have this in my pool, but it is on the sides, in the cracks around the returns or anchor points etc. How do I treat those spots, if the chemical/granuals are supposed to sit on top?

[@PoolSchooler]

The best method I have found for black algae on sides or walls of your pool, is to get something like a Ladies nylon sock, put the granules in that, and then tie a string and dangle it off the side of the pool, so it comes in contact with the affected area. It’s a bit of a pain to do but it’s the most effective way I have found to get the product to sit on top of the affected area.

[@bobbywilliams155]

I have a liner pool. How would I treat it for the algae? Since you recommended not using the Tri clor and Pr 10000 on vinyl liner pools Thank you for your great info

[@PoolSchooler]

You could try draining it (once it cools down) and spraying the affected areas with bleach, waiting bit and scrubbing it with a nylon bristle brush. Then refill the pool. Keeping phosphates low and maintaining proper chemical levels (along with good filtration) should keep all algae away).

[@ttpp3261]

I clean pools for a living and have been having trouble with this. I keep finding it in semi middle of nowhere pools and in some with really bad plaster and I was wondering how easily does it spread on equipment because I can't tell if it is my fault or I am just getting unlucky.

[@PoolSchooler]

It could be as simple as a phosphate issue (that's what all types of algae feed of). You said "semi middle of nowhere", could that mean that their in areas of high dust or vegetation? That would equate to high amounts of phosphates in the air and thusly in the pool. Also you mentioned pools with really bad plaster. The more pitted (old) the plaster is the easier it is for the black algae to attach itself to it. My guess is it's phosphates.

[@ttpp3261]

@@PoolSchooler thank you for the response. Yes a lot of these pools are in a semi rural area outside of the city I live in where there is high exposure to dust, dirt and wind. Also what is the likelihood of spreading this on your equipment because I'm a little worried about that despite trying to keep my stuff sanitized as best as I can.

[@PoolSchooler]

@@ttpp3261 Honestly I think it would be extremely rare to spread that to other equipment. So I think you’re good. The wind and the air do the heavy lifting when it comes to spreading all the phosphates. You can’t really spread it.

[@ttpp3261]

@@PoolSchooler what about the algae itself, does it attach to equipment if you come into contact with it?

[@PoolSchooler]

@@ttpp3261 It shouldn't.

[@thuyh823]

Hi Kenny, my pebble tec has black algae on the bottom and can I use chlorine tablets to scrub them off like the way you did with pool liner? Thanks

[@PoolSchooler]

I'd suggest doing it the way I describe in this video.

[@Rav123123]

my current pool guy is ass then. otherwise i wouldnt be here tryna deal with it myself. wish you were here Also do i need to clean my filters while the trichlor settles?

[@PoolSchooler]

You shouldn't have clean your cartridges just because you killed off some black algae, unless it's been awhile since you last cleaned them. (between 8-10 months).

[@Rav123123]

@@PoolSchooler thanks for replying on an older video. It's probably been an unknown amount of time. I purchased this house and while the previous owner kept good records of everything else in the house the pool is not one of them. I am going to get a replacement set to chuck in there and get that cleaning solution for the ones in there.

[@princejones7991]

How do I treat the algae on a plaster pool when it's attached to the walls of the pool? my pool guy is convinced I need a new filter system he doesn't like me Sand filter but $ is tight right now..... 😊Please help!

[@PoolSchooler]

As long as your sand is not too old and the filter is running long enough each day (8 hours swim season, 6 hours off season) you should be fine. If it's black algae on the sides you have to use something like a sock or nylon to put the TriChlor granules in and "dangle" them from the side of the pool so it touches the black algae. MAKE sure you get the phosphate remover in the pool ASAP! Also backwash your filter daily for a week or so to eliminate the dead phosphate etc. If you're sand is over 5 years old you may need new sand. Old sand is worthless when it comes to filtering.

[@user-oo9rb3ei7w]

Thank you for the video. May I ask what's the particular brand of the combo brush you use? Will the metal bristle fall off in the pool? Thanks.

[@PoolSchooler]

I'm not sure of the type of combo brush I use. I did a video on brushes which may help. I believe currently I use one made by A&B. Heres a link: kzbin.info/www/bejne/mJCppGCOipZkhLc Also, as long as the brush is not really old and deteriorated and not kept in the harsh sun you shouldn't have a problem with the bristles falling off. If you find the metal or nylon bristles falling off it's time to get a new brush AND store it in a cooler place out of direct sunlight.

[@kis10142]

Hello I have a Pebble tec pool that has brown and black pebbles in a mixture of other colors. We suspect that we have black algae but we don't know exactly where to find it. We can see green algae on our shelf and yellow on the walls but no black. Do you have any suggestions?

[@PoolSchooler]

Black algae is usually visible and can attach itself and grow anywhere on you pebble tec. If you can't see it, then you probably don't have it. But treat any and all algae the same way. Remove the phosphates (watch this video): kzbin.info/www/bejne/g6uqoH5qeMlqqsU Hope you'll subscribe to and share my channel and for more money saving DIY pool stuff please check out my website poolschooler.com

[@kis10142]

@@PoolSchooler I tried your method with the granules and left it for 4 hours, added no phos, turned it on overnight. Chlorine was ideal 2 in the morning. 1 in the afternoon, 0 in the morning. Added 6 gal liquid chlorine at 12n, turned on the system, 0 by the evening. We have water bugs, sanitizer level is always high, no vegetation in the pool. I'm at my wits end. I see no signs of algae & pool is crystal clear. I'm in Phoenix too. During the month of July, we were out of town for 2 weeks and we got all that rain.. My filter needed a cleaning and the capacitor went bad. The water was ruined. Do I just empty it and refill? Maybe a chlorine bleach bath? I appreciate any advice

[@PoolSchooler]

@@kis10142 You may need to do that (drain and refill) just to start afresh. BUT watch my video on start up chemicals and how to add them so you don't over dose your pool with too much CYA or you'll be back to square one. Here's a link: kzbin.info/www/bejne/aJLXmJadmdp7iKM Also you said you didn't add phosphate remover. That's an important part of keeping algae away as phosphates contribute to the growth of all types of algae. Watch this video too: kzbin.info/www/bejne/g6uqoH5qeMlqqsU

[@kis10142]

@@PoolSchooler Thank you for that information!. I did add No Phos which is Leslie's generic brand of phosphate remover. It's been 3 years since we filled the pool so we were going to do it in April anyways, but here we are :D Good times! Thanks again. Your videos have been very helpful

[@PoolSchooler]

@@kis10142 ah gotcha. Thanks for the clarification. Check your CYA level if its above 300 ppm then it probably is a good idea to change your pool water

[@jimdonaldson3420]

Hi, my pool installer said using TriChlor will eat holes in the plaster. Can you address?

[@PoolSchooler]

If you have old plaster (maybe 7-10 years old) a painted pool, vinyl or fiberglass it's not good and may damage the surface. BUT that's why I say "YOU ONLY LEAVE THE SETTLED GRANULES ON THE AREA FOR AN HOUR OR TWO MAXIMUM THEN BRUSH OFF and you should be fine. I've never had an issue with it damaging the plaster as long as it wasn't any of the above exceptions.

[@jimdonaldson3420]

@@PoolSchooler thank you so much. The pool is only two months old. Appreciate the reply.

[@PoolSchooler]

@@jimdonaldson3420 Then you should be fine. Pool builders sometimes say things like that to limit their liability. Again I must say that you do this at your own risk as there is alway a chance it could bleach or erode the plaster a bit, but in my experience I've never had that happen. Again make sure you don't leave it on the plaster too long.

[@cocoliasvd]

Good afternoon. Is it possible to get black algae on a new pool, first filled 2 weeks ago? Chemicals seem to be where theybare supposed to be, but I saw this morning 2 areas on the step of the pool with 2 chunks of tiny black balls, and some floating in the water. I got one out, and it was slimy, but my husband insists it can't be black algae. What else could it be?

[@PoolSchooler]

It's always possible but somewhat unlikely. As long as you had your chemicals at ideal levels. You may want to try up your chlorine levels and try adding some phosphate remover like PR 10,000 by Orenda. Algae feeds on phosphates.

[@cocoliasvd]

@@PoolSchooler thank you!

[@PoolSchooler]

@@cocoliasvd You're welcome. Hope you'll subscribe and check out my membership website poolschooler.com AND my production page tappingtheworld.com

[@reedrodz75]

Where can I buy the Super algae destroyer that size? Thanks

[@PoolSchooler]

To be honest, I have not been able to find that product for a while. Even my supplier has been out. I would suggest EZ Chlor’s granular algae out do a Google search and you’ll be able to find it I think it’s available places like Walmart online

[@klmrehl1213]

Do you have to clean the cartridges after?

[@PoolSchooler]

Typically no. But if it's been awhile since the cartridges have been cleaned (over 6 months) it may be a good idea to do so. Hope you’ll subscribe to and share my channel and also, please check out my website poolschooler.com for exclusive DIY pool maintenance tools and more direct and priority communication with my for your pool maintenance needs.

[@genebrimage9150]

How do you apply tri chlor for treatment of black algae on walls?

[@PoolSchooler]

I have gotten that question so often lately, but I’m actually going to do a video on it and release it later next month. But basically you need to find a way to suspend the granules and have them make contact with the affected area on the side of the pool. Best way I do that is get something like the foot and of a nylon stocking put the granules in the stocking tie it off and then dangle it with a string so it contacts the affected area secure that string with some kind of weight or rock at the edge of your and leave it there for a couple hours brush it after that and repeat if necessary

[@genebrimage9150]

@@PoolSchooler Thank you for the reply.I’ve heard that technique

[@PoolSchooler]

@@genebrimage9150 you’re welcome, that honestly is the best way to do it that I know of.

[@anthonyz584]

Good Morning, How do I kill black algae in a fiberglass pool? I may also have some green algae too. Does calcium hypochlorite pool shock work well? Any advice much appreciated.

[@PoolSchooler]

Difficult with a fiberglass pool. If you use my method (which you can) you have to be extra careful to not leave the trichlor granules on it too long. Maybe an hour maximum. Then follow the rest of the video. ALSO make sure you don't use a combo metal/nylon brush ever on a fiberglass pool. Use a nylon pool brush only. Lastly, I don't like Cal Hypo too much I don't think it's nearly as potent as Trichlor. And don't forget the phosphate remover. It's critical. For more great DIY Pool Service stuff check out my website poolschooler.com

[@maryellenmainville]

but what if the BA is on the sides of your pool the triclor cant sit on sides

[@PoolSchooler]

That definitely is challenging. Honestly, this may sound strange, but take a nylon stocking and put the Treichler granules in it, and then tie a rope around it and dangle it on the side of the pool, low enough for it to contact with where the black algae is. Honestly, that’s actually how I’ve taken care of it on the side of the pool.

[@sturkfeld]

Hi. I find your videos very informative. Is there another product (maybe sold on Amazon) comparable to the Pool Season triclor granules? I can't find the product online or near me. When I look for granules to kill black algae, shock always comes up but I know you don't recommend shock. Thanks.

[@PoolSchooler]

Try EZ Chlor's Granular Algae Out:

[@sturkfeld]

@@PoolSchooler Thank you but I can't find that locally either. Online shipping is too high or size is too large.

[@johnnybravo508]

Do you have any videos of mustard algae?

[@PoolSchooler]

I don’t, and the reason I don’t is because I treat mustard algae the same way I do green algae. If you watch my video on Algae and Algaecides and why you don’t need them you will see my primary way of dealing with it which is basically to reduce the phosphates in the pool. Which are the primary source of food for all types of algae. But you bring up a good point it might be a good idea for me to do one on yellow or mustard allergy unfortunately my pools are taken care of so well I never have an issue with that. But I will keep my eyes open and if the opportunity comes up I will most certainly do a video on that

[@Parkpill13]

Would the use of Trichloro granules discolor a pebble tech pool?

[@triciaw5802]

How do i clean and scrub off algae built in my tan colored tile grout.

[@PoolSchooler]

Is it on the tile water line? If so watch this video: kzbin.info/www/bejne/g4bLk56Ygbuth5o Even tho this is about black algae It applys to any algae on the water line.

[@triciaw5802]

I will try tabs and the 2 to 4 hr trick

[@JP-nm8pj]

Love this video and will give this method a try. Is there a cheaper tri-chlor granuel you could recommend other than Pool Season you show in your video?

[@PoolSchooler]

I've been using that one for a long time now. I'm sure there are others. I'd suggest doing a google search for Tricolor Granules and see what you find.

[@AzazelBathory]

JP if you buy your own chlorine tablets there’s some of that very fine chlorine dust in the bucket or bag, that is also trichlor I believe.

[@JP-nm8pj]

@@AzazelBathory thank you. I bought the Pentair Algae Gon tool and have been scrubbing the spots with the 3 inch tablets without success. I'm going to test my phosphate levels tomorrow to see what is going on because it's spreading pretty rapidly.

[@AzazelBathory]

JP if it doesn’t go away, you could always drain the pool down to where the black algae is, scrub it with bleach and brush everything down to the drain afterwards to ensure the dead black algae doesn’t become food for more algae. Either way always make sure you get all the dead algae into the drain and preferably backwash the pool after it’s filled up again. Hope you find what works for you.

[@andytwentyman9573]

You leave trichlor on a spot for hours and you might very well stain it

[@donays8241]

Any problems if I living the granular for 12 hours?

[@PoolSchooler]

Do you mean if you leave it on the bottom of the pool for 12 hours? I’m not sure it will stay that long without dissolving, but it is a chlorine so if it doesn’t dissolve fully in 12 hours it could bleach the surface, which could be unsightly.

[@donays8241]

@PoolSchooler thanks for replying, I put back the algae treatment like you used in this video but I'm not sure if I could turn the pump off for 12 hours or has to be 3 or 5, I'm wondering if the long-time Seattle in the floor could damage the plaster.

[@donays8241]

I did subscribe to your Channel, thanks for your information. I didn't know why I had black algae in my pool, everything was OK in chemistry.

[@PoolSchooler]

@@donays8241 I probably would not leave the granules on the plaster for more than a couple hours since it sounds like you say the Plaster is a little bit older

[@PoolSchooler]

@@donays8241 check your phosphates, typically the reason any type of algae grows in a pool provide the chemistry and filtration are good, is due to excess amounts of phosphates. Watch my video on algae and algesic sides and why you don’t need them and it will explain.

[@chicochico9715]

Hi i need some advice and to know if what i been told is true as i only come across videos on youtube with black algae stains .I have a 1 year old brand new fibre glass pool and since a few months back i realised i have tiny sticking out spots on the blue gel coat ,i have loads all around the walls and hardly any on the bottom, i been told it`s algae inbetween the gelcoat and fibreglass and to treat it with 100ml of algae black every week and it will slow it down and if spots are small it will disappear as it`s algae trapped behind the gelcoat and fibreglass and if i don`t treat it ,it will then start going black. I am wondering if this is true as i only hear stories about the typical black algae .thx

[@PoolSchooler]

It seems strange to have black algae trapped between the fiberglass and the gelcoat. Since that's all done at the factory. Sounds like a defect in their manufacturing process they need to fix. I guess I'd follow their advice BUT ALSO ADD SOME PHOSPHATE REMOVER. Since phosphates are the primary catalyst for algae (all kinds) to grow. Get rid of the phosphates you should be able to keep new algae from growing. Watch this video it'll explain: kzbin.info/www/bejne/g6uqoH5qeMlqqsU

[@brandonswift3218]

How about for black algae that's on the wall and sloped corner, and NOT the flat bottom? I would love to sprinkle the trichlor on there, but it just falls past where I would like.

[@michaelislas4475]

You can take a chlorine tablet and rub it on the spots like chalk. Only for plaster pools, not vinyl etc.

[@reggielamay3870]

I use a long pvc pipe and shoot Dichlor straight down on the black algae and let it sit on it.

[@PoolSchooler]

THAT is a GREAT IDEA!!! Thanks so much for sharing!!!

[@DavidThomas-dw4td]

What to do if the black algae is on the pool walls??????

[@PoolSchooler]

A good question that I'm getting a lot. Guess I'm gonna have to do a video on how to deal with that. Until then get a thin nylon sock (or stocking foot) fill it w/TriChlor granules. Tie a string to the open end to close it off and dangle the sock on the string in the water on the side of the pool directly where the algae is until it touches the spot. Secure the string w/something heavy, (a rock, weight etc). Let is sit on the spot for a couple of hours then brush the algae. It if it all doesn't come off repeat the process. Hope that helps. And make sure you subscribe to my channel and turn on notifications so you don't miss when I put out that video.

[@briantrip5022]

I have black Algae but its not in my pool its the outside around the edges on the poris concrete

[@PoolSchooler]

You could still try the trichlor granules but they may bleach your concrete.

[@junior_4687]

When you add phosphate remover and it’s done settling and doing its thing do you ever bother vacuuming it up after ?

[@PoolSchooler]

Junior_4 I believe you’re confusing the trichlor granules with phosphate remover. The phosphate remover is liquid and the trichlor are granules. The granules will have dissolved after 2-5 hours so after brushing it off and add the phosphate remover you should just run your filter and your pools regular cleaning system should clear the water and residue up.

[@junior_4687]

Pool School No I was talking about phosphate remover after it flocs out but you use the filter method on the bottle of pr10000 is says to let filter clean it up or vacuum it up. Thank you

[@motomaxsandiego]

@@PoolSchooler _

[@beverlybyrd7531]

Thank you Kenny

[@f1f278]

Hi Kenny, i have about 5 coffee colored spots near the deep end drain, are they likely black algae? Im assuming they are because scrubbing them doesnt remove them. If so, i have a bunch of leslies 1lb shock bags that i hardly use, can i use this in lieu of your tri-chlor granules? I just want to use up what i have and then get the trichlor etc when i can later and do it right. Original 1980s Plaster, 20,000G

[@1dluep]

plaster has most likely worn out and you are seeing the gunite showing through, especially a pool of that age.

[@f1f278]

@@1dluep ok thank you

[@terrypapineau6993]

Shock is not the same as tri chlor. If it is potassium monoperulfate it’s only an oxidizer

[@elvinapereira4116]

What happens if it’s black algae in your walls

[@PoolSchooler]

That can be more tricky to be sure. What I do is put the trichlor granules in something like a nylon sock (thin fabric) then tie a string to the open end to close it and make it long enough to suspend off the pool deck so that it contacts the affected area. (use a rock or brick etc to secure the string). Then leave if for a few hours, (no need to run the pump) then remove and brush the area again.

[@downunderoioi3421]

I was told by the pool company to make sure your chlorine levels are LOW before treatment.

[@PoolSchooler]

Not at all. Not sure why they'd tell you that but I whole heartedly disagree with their recommendation.

[@pgnandt]

That's a big no.

[@cynthiabennett4526]

What do you do if most of your black algae is on the sides of your pool.

[@PoolSchooler]

That's a bit trickier. If it's just a few spots you can put the Trichlor granules in something like a sock or panty hose end and then dangle it into the pool so it touched the affected area for a few hours then scrub it off. A bit of a pain too. BUT if it's a lot you may be better served to drain the pool, acid wash it to remove the algae and then refill and get your chemicals up and make sure you keep your phosphates low.

[@cynthiabennett4526]

HI Kenny we did the black algae the way you said but after we put in phosphate remover shouldn't we clean the filters so the black algae doesn't go back onto the pool? Help

[@PoolSchooler]

@@cynthiabennett4526 it would be helpful to do that yes. See my note to your other comment on backwashing and recharging a DE filter.

[@cynthiabennett4526]

@@PoolSchooler thank you, Kenny we did that again. It really needed it.

[@cynthiabennett4526]

@@PoolSchooler we got some burlap sacks & held them up with rocks. Worked good. Thank you Kenny

[@cynthiabennett4526]

After I put the phosphate remover in shouldn't I clean or back wash the filters. Thanks Cindy p.s. we just did the black algae the way you said to do it Kenny

[@PoolSchooler]

See my comment back to yours on Backwashing and Recharging a DE filter.

[@stinkintoad]

I pressure washed the black algae spots off with the water in it ! And it worked

[@PoolSchooler]

That's great to know. Thanks for sharing that.

[@stinkintoad]

@@PoolSchooler Thanks for replying ! I have a 15,000 gallon kidney shaped pool and it has always had a slightly higher than normal alkaline level- about 150 ppm. My ph tends to always read lower than normal requiring ph up be added at least weekly. We put chlorine tablets in both skimmers and shock regularly. The pool looks fantastic but I'm somewhat stumped on this alkaline. I live in Dallas and the temps here are extremely hot lately- any thoughts as to the high alkalne level and how to correct it would be greatly appreciated. Thsnks

[@PoolSchooler]

@@stinkintoad In most of my pools in AZ Ive found the alkalinity and ph to read similar (ie: if one was high, so was the other and visa versa). HOWEVER, it's not always like that so I did two videos on how to adjust one or the other without affecting the other and I think they'll clear things up and help you a ton. Heres links to both. Adjusting Ph: kzbin.info/www/bejne/omiUepyfadqNnbs Adjusting Alkalinity: kzbin.info/www/bejne/bGGtXoKZpMiAhtE

[@PoolSchooler]

@@stinkintoad I'd warn against putting chlorine tablets in the skimmers with any regularity as the concentration of the chlorine can increase deterioration of the pipes and filter. Use a floater. To adjust ph without affecting Alkalinity - Muriatic acid to lower ph, Soda Ash to raise ph. To adjust Alkalinity without affecting ph - Dry Acid to lower alkalinity, Bicarbonate of Soda to raise Alkalinity. I'm not a fan of the ph or alkalinity "up or down" products.

[@felixint]

hi. wow i planing do that thank you next week i try

[@john19633]

Thanks for the video my question is you mentioned painted pools but what about blue or other color pebble tech if I’m not mestaken the pool in your video looks like a blue pebble tech so would I be able to do this treatment on my pool with browne pebble tech?

[@PoolSchooler]

My experience has not shown that it would be harmful. I did once hear of a circumstance where it did bleach the pebbles BUT later found out that it was due to a faulty dyeing process in the pebble tech itself that caused it to bleed. TO BE SAFE, I'd suggest testing it out in a VERY SMALL area (perhaps a small quarter size area on a step and see if it causes any discoloration. Hope that helps.

[@joeycoz1]

Great video. I have been looking for a HIGH concentrate tri-chlor. I ordered exactly what you had in this video. What about black algae on the walls of the pool? I spoke to my parents pool guy (he's in FL and me and my pool are in SC). He recommended using 25lbs of tri-chlor after brushing the algae. What do you think of this? I have been battling the black algae for a year now. Getting the stuff off the bottom is easy. Just turn off equipment, brush, pour granules on it. I have read that I can rub pucks on the walls to remove, but that is unrealistic with the amount of black algae on the sides of my pools...

[@PoolSchooler]

It's a bit trickier on the sides. Same principle tho. You have to find a way to put the TriChlor Granules in contact with the algae. I use a nylon stocking, adding some granules to it and dangling it (with a string) so it touches the algae area. ALSO, keep those phosphates down, chlorine levels up and filter clean and running long enough and you'll not have to battle any algae. Thanks for watching and please subscribe.

[@johnchell6326]

Same question here. What about the sides which is the only surface I have the black fungus issue? I would think scrubbing a puck would be more effective than dangling a nylon stocking? If I had a lot of it, I would drain and call in the Calvary

[@sandydorman467]

Does this work for a saltwater pool

[@PoolSchooler]

Absolutely

[@judi144]

How do you get rid of the black algae if it on the side of the pool walls? The powder won't attach to the side of the pool.

[@PoolSchooler]

Thats a bit trickier. But here's what I've done (it may sound like a pain but it does work). First get a small cloth (like canvas) bag. Preferably one that your can cinch at the top. REMEMBER TO BRUSH THE BLACK ALGAE TO BREAK THE "SKIN". Put your a small amount of trichlor granules in it. Measure a length of string that will allow the bag to reach exactly to the black algae. Lower it to the black algae from the edge of the pool and secure it in place (maybe with a rock etc). Leave it for several hours and then brush the area. That should do the trick. I know it sounds like a pain but it does work and that's what I've done on the rare occasion of black algae on the side of the pool wall. Hope that helps.

[@judi144]

@@PoolSchooler Thank you. I will give that a try.

[@ehsanettehadieh4397]

So how do you know if the black Algea is gone after treatment or you have to keep doing it, it seems it is deep rooted into the plaster & black spots are there to stay?

[@PoolSchooler]

the black spots should disappear if treated properly. But in all honesty, algae (of any type) is just par for the course in pool ownership. Like having a lawn. Mowing, fertilizing etc is just part of having a lawn. But algae, not matter what type is part of owning a pool BUT with correct and consistent maintenance it can, just like everything else with ones pool, it can be managed and kept away.

[@brtsnx86]

Why trichlor rather than dichlor?

[@PoolSchooler]

@@brtsnx86 I just found from experience that it’s more potent and effective against black algae. And all algae for that matter.

[@nohemi1029]

How would you treat algae in a fiberglass pool?

[@PoolSchooler]

Watch this video. Although its with a above ground vinyl lined pool all that I do here would apply to a fiberglass pool. kzbin.info/www/bejne/joqQc3Sad75jsKs

[@nohemi1029]

@@PoolSchooler thank you very much for the link! I will give it a try.

[@dallasvirusremoval1868]

Use Leslies Black Algea Killer !!

[@jillolson5372]

Will this treatment kill mustard algea?

[@jillolson5372]

Oops..just saw a prior reply😊

[@rongreen1103]

It works....👍👌

[@jasonrood5453]

How often do you use the phosphate remover to keep a pool free of algae? Does the phosphate remover cause any other issues or issues with the filter?

[@PoolSchooler]

Keeping phosphate levels low is just a part of the puzzle in keeping algae away. Proper pool chemistry, clean filters, proper flow, adequate filter run times also play a part. But in this video I talk about keeping phosphate levels low: kzbin.info/www/bejne/j6uuaHR6ZZx7d7s

[@PoolSchooler]

I have not heard of nor experienced any problems in the filter or other issues caused by phosphate remover.

[@jasonrood5453]

@@PoolSchooler Thanks for your reply. How often would you recommend the pool to be treated with the phosphate remover to prevent algae?

[@PoolSchooler]

@@jasonrood5453 I usually add phosphate remover once every month or two during the swim/warm season (depending on the pool and the amount of vegetation surrounding it and the area). Then during the off/cooler season usually every 2-3 months. During the fall there can tend to be a lot of leaves falling from trees so you may need more frequency depending on your area and the vegetation. But that's my usual protocol.

[@AzazelBathory]

The phosphate remover I use never causes issues with the filter. I add it into the skimmer after i have backwashed the pools and added the appropriate amount of DE, I do this once a month. This alone does not remove algae but is a good preventative step.

[@goaley45]

What % of tri-chlor in the granules? Can I use tri-chlor powdered shock that I have instead of buying the granules you recommend?

[@andytwentyman9573]

Should be the same, around 99 percent for any trichlor

[@alexdelgadojr7718]

Do you have any pools with black algãe?

[@PoolSchooler]

I have had them in the past. But I don't really have that happen with my regular clients pools cause of how I maintain them and the chemistry. About the only time I come across black algae is when a new client calls me (or a friend who needs help with their pool) and sometimes those pools may have black algae in which case I take care if it the way I describe in this video. For more great DIY Pool stuff check out my website poolschooler.com

[@mikelawrence8308]

What about black algae on the sides?

[@PoolSchooler]

Its a lot trickier. I've actually dangled a small cloth bag of triChlor granules from a string against the affected side directly on the spot for a couple hours then brush off. I know it's a pain but it does work.

[@jennifercarrell2986]

I have the algae on the sides, also, pretty much all the way around. How far apart would you recommend hanging the bags? Thanks!

[@PoolSchooler]

@@jennifercarrell2986 If you have that much algae you really need to get your phosphates down. Use a combo brush to really scrub the algae on the sides. If you have that much you may have to wait til you can drain your pool in the cooler months and do an acid wash to get it all off.

[@Bush__pigg_007]

What about the sides of the pool?

[@PoolSchooler]

jack ripper That’s definitely a bit trickier. Usually you have to get something like a women’s nylon stocking and put the granules in that and then hang it off the side of the pool at the level of the algae so that it comes in contact with it. It’s kind of a pain but it definitely works.

[@timezonewall]

@@PoolSchooler I've never seen much black algae on the bottom, it's nearly always near the waterline where the tile transitions to the plaster, or dots on the sides. It's rare to be on the bottom at all. Trying to hang a nylon stocking seems impractical when there are dozens of back spots around the side of the pool. I wonder if why your experience is different on where it's located. It's very hard to get rid of, the only thing I've found to get rid of it brushing each spot vigorously with a small wire brush while in the pool (not from the deck above).

[@PoolSchooler]

@@timezonewall I've actually rarely seen it on the side of a pool. I've found it mostly on the bottom or water line. If it's on the water line I use a chlorine tablet and "chalk" it around the algae, leave it for several hours and then brush it off and that takes care of it.

[@timezonewall]

@@PoolSchooler I wonder if where it appears has something to do with the water circulation pattern for a given pool, like where the most turbulence occurs(?). Good tip on chalking the spots with a puck.

[@shannonpruski3074]

I’m trying to find the Trichlor (super algae destroyer? Where do I find the produce?

[@PoolSchooler]

Try looking up E-Z Chlor Granular Algae Out

[@theedrstrangelove]

Just drain, scrub with an acid wash, then use TSP. Rinse off, flush out plumbing, and refill. If you have rough areas or pits, re plaster those areas and blend, then refill.

[@PoolSchooler]

That's for sure a good idea BUT sometimes people don't want to drain their pool and go through so much water. Especially if they have the issue come up every year or so. But I appreciate the comment and suggestion.

[@LuisAguilar-wv4tn]

BLACK ALGAE CAN BE BROUGHT TO THE POOL BY ANYONE WHO SWIM IN A RIVER OR BROUGHT FROM AN OTHER POOL REGARDLESS IF YOU HAVE A “ PERFECT “ CARE OR MAINTENANCE

[@pedrolibra6069]

Scrubbing the black algae with a chlorine tablet work faster and better.

[@myanime101]

Scup that aljay

[@letsgobrandon2765]

😆 Dude you just trashed your customers auto vac Take it out when treating

[@PoolSchooler]

I've actually never had a problem with this hurting the vac. Or causing it to wear out prematurely. But it's good to know. Thanks

[@PoolSchooler]

BTW, I like your user name. 👍

[@ralphdiaz5943]

You repeat yourself too much!

[@PoolSchooler]

Sorry about that, I'd found that a lot of my views sometimes miss what I say and so I started repeating things to make sure they didn't miss them.

[@dallasvirusremoval1868]

Why or why do you mispronounce ALGEA ???? search for the annunciation it's AL-JEE the "Jee" sounds like or pronounced "Gee". Dude in every video you have the speaks of algea you incorrectly pronounce this WORD! This makes you look like a true One-Poler !! Also, most of the info you teach is half incorrect or territorial.

[@timezonewall]

Pool maintenance does vary somewhat by region so it's best to find videos from someone in your area or an area very similar. People who make videos are doing it based on personal experience which is usually only in one location, this guy is in Arizona so the pools are open year round, it gets very got at times and never freezes so there is no "winterizing" like is done in the north. I agree his pronunciation of algae is odd.

[@kis10142]

Better than Al Ghee with a hard G lol

[@deakanutz]

Damn ducks land in our pool

[@PoolSchooler]

I actually have a client who has four floating crocodile heads that tend to keep the ducks and pigeons away