How to Build a Monotub | Step-by-Step DIY Guide for Indoor Mushroom Growing | Monotub Tek | (Part 1)

[@everestcheats2622]

I bought an All-in-one grow kit a couple of years ago. I had taken a spore print, and I now have a truly unlimited supply of medicine. I am now working on maximising yields. The info in this video is going to have me busy all weekend. Many thanks for sharing!

[@NorthSpore]

Wonderful! Thanks for watching 🙂

[@yucsy6974]

Whered you get it from?

[@rando4832]

Medicine😂 sure what every you say

[@SheddysGaming]

​@@rando4832 tell me you don't understand neurogenesis and it's therapeutic effects without telling me.

[@Nikki-ub4ky]

​@rando4832 Closed minded views like that aren't doing your neuroplasticity any favors homie. Imagine coming in here hot thinking it's just a bunch of stoners and finding a bunch of science nerds instead. Things change when you crack open a book.

[@GeneralMcNuggs]

This is an amazing video for newcomers. The rabbit hole can be overwhelming at first so these concise and informative videos are vital.

[@NorthSpore]

So glad to hear it!

[@hrdcpy]

So true. Their original guide is an amazing resource and they've elevated it here. ✌️

[@GeneralMcNuggs]

@@NorthSpore Big fan of your grain spawn too guys! There's a lot of inconsistent sellers on Amazon and I have seen nothing but quality and care with your products.

[@aaronserrano9462]

This was an amazing video! I am still a beginner and am currently trying out your all in one grow bag for the first time ever. There only seem to be short videos related to the all in one bags. I get that it is pretty straight forward but it would be nice if there was longer format video such as this one where you can show a harvest and second flush of the all in one please. Thank you very much for all that you do for us who wouldn’t be able to do this without your help!

[@NorthSpore]

Yeah, we will keep that in mind! Thanks!

[@fa7e5]

I thought this was supposed to be a fish tank, now I can start using it correctly. Thanks North Spore!

[@MRods47]

Thank you. For drilling bdw I've used a soldering iron before. Mark the circular holes, set temperature if possible to around 350 C, use the razor looking tip and melt slightly inside the marked lines, surprisingly clean cuts, no burr and no fear of cracking. Any uneven cuts can be melted back using the iron (which is why cut slightly inwards). Keep a wet rag handy to wipe the solder tip if too much material gets on it.

[@hrdcpy]

Genius! I found it helpful to hold a block of wood against the drilling area for support. ✌️

[@benjismithson6787]

Your channel is amazing, and you even offer your own kit for sale!

[@RealMTBAddict]

Trying growing out again. 2 different strains coming, can't wait.

[@buckshot927tx]

Such a well produced and informative video. Thanks so much!

[@NorthSpore]

Thanks for watching!

[@BEDROCKSAVIOR]

​@@NorthSporeinstead of the adhesive filters could I use cotton balls to save a little? Or are a specific kind of filter necessary?

[@Primitivemycology]

These guys have great products all across the board. I have never been disappointed with anything i have gotten from them. And the customer service is phenomenal. Cant say enough good things

[@NorthSpore]

Hey thank you! Happy to hear that 🙂

[@soloflyingmonkey]

Thank you for the great video. Amazing instructional design! I also appreciate you built the video in a way to not sell your products, but to offer them if someone wanted. Buying your products because of all these reasons.

[@NorthSpore]

Thank you!

[@MrJohnrendek]

Great job amazing content and I learned a couple of important things!

[@NorthSpore]

Thanks for the support!

[@marvinl.herren811]

Good job doing the video. Not a lot of endless explaining. The things you did talk about were understood. Im using this method and materials so your video is helping. Thanks!

[@NorthSpore]

Glad to hear it!

[@THEROMANGNOME]

I would suggest the use of a pipe de-burring tool when cleaning the edges of the drilled holes. Much faster and safer than using a standard razor. Great video!

[@NorthSpore]

Great idea! thank you for sharing

[@JonathanYankovich]

I ❤ my deburring tool!

[@mattb6646]

I'm a machinist so I have plenty of rattle burr deburring tools... but most people don't wanna buy a different tool to deburr a few plastic holes when a razor will suffice and most people already have.

[@keyscook]

Great tutorial. Perfect timing as I'm just about to get supplies. Cheers!

[@NorthSpore]

Happy to help!

[@Caroxmtk]

WoW! Thank you🥰very informative, I was going to start growing Majic Shrooms I hear they grow Grey brain matter and can help people with brain issues, Alzheimer’s, brain injury, depression all kinds of stuff! God our creator gave us everything to heal us in the form of PLANTS! Things that come from our Mother Gaia😉❤️🌿🌳

[@pepinoisdum]

thank you for this video ! i just recently bought one of your all in one grow bags and am beginning my journey of growing my own mushrooms for medicinal purposes ♡ !

[@TerpyTen]

I finally upgraded and built a fully automated Martha Tent. Getting ready for about 100lbs of mushroom and substrate 😅 5 types of Oysters, Hen of the woods, Enoki and even a glow in the dark variety; panellus stipticus.

[@michaelandersonsa]

excellent excellent excellent tutorial

[@ustotz]

This is very helpful, thank you very much!

[@chrispewkreme]

Came across an instagram video from you guys. I figured there’s gotta be a way for me to just grow my own rather than overpaying for chocolates and whatnot. Gonna try this out and hopefully make some awesome chocolate for s’mores

[@macbmx2461]

I subscribed bc you did the tendril thing when u changed bits.

[@MrTomkelso22]

Great video! I look forward to getting started.

[@NorthSpore]

Let's grow! 🙌

[@KevinsJonathan]

Ayahuasca was mind blowing for me. I found myself in a world where swirling colors created a mesmerizing kaleidoscope. Time stretched as I explored cosmic landscapes, feeling a profound connection to everything. It left me with a deep sense of peace and wonder, realizing the limitless potential of the mind.

[@RealMTBAddict]

This isn't ayahuasca.

[@mattb6646]

You should airate your spawn bag when you first innoculate it.. i think thatd probably why it took a month for 30% growth. Mycelium needs oxygen to grow, just stretch the bag out so oxygen is pulled in through the filter

[@paultogneri9783]

Excellent Video, very informative for a beginner to intermediate grower. I learnt more here than most of the other videos put together, good job bro...

[@NorthSpore]

Thanks dude!

[@TheUniquePanda]

This awesome thank you so much can't wait to grow magic mushrooms 😢❤

[@radders261]

I grow with grow kits. Mate, I'm really gonna try this. Thanks for sharing! Were they golden teachers bty?

[@AlexanderSchwarz-ck3cx]

Nice video! Can you use micropore tape instead of the filters? Maybe using multiple layers of micropore tape would work too?

[@nkim5272]

Micropore tape works fine too. I saw a video using two layered micropore tape.

[@NorthSpore]

Yes you can!

[@CastleHives]

Great video. I am new to growing. I received 2 culture syringes from you, and can't wait to start.

[@NorthSpore]

Let us know how it goes 🙌

[@thefilamentcorner]

Hey Brian, cool to hear your starting mushrooms. I'm thinking of getting back into them, but I've got to look at preventing contamination. Found out from the last time growing that the house is a great habitat for it. Also watched a channel called GordoTEK build a cheap laminar flow hood. I might try to use the one at work if possible.

[@KhunRoZi]

Excellent video. Thank you so much!

[@NorthSpore]

We appreciate the support 🙂

[@alkeryn1700]

i use unmodified shoeboxes, a lot easier imo.

[@ShadoLowks]

Teach a brotha

[@jackdandcoke1]

Do you put them inside a mono or anything with micro-pore on it? Or do you just stack bunch of shoe boxes in the corner? Do you have the kind with the clip on lids or does it make no difference?

[@user-rt6vp6uo3b]

@@ShadoLowkssame as this video sterile plastic lining, besides you do it in a shoebox no modifications needed to the box

[@solondarville1020]

For real teach a brotha

[@ReviewCart69]

Uncle Ben’s rice tek

[@aqqalukmalikdavidjakobsen3958]

Try putting a notter cassing layer on after a 3 harvest and fill in the side too

[@fincarosa6767]

I have to use a tub with a rubber seal,because fungus knats are an issue for me when growing culinary mushrooms. Hopefully this will help someone else 🙏🏽 🍄 ❤

[@jackdandcoke1]

I have shoeboxes without seal. You think micro-tape would work for a seal

[@musical2806]

Using a Step Drill Bit is way better for drilling holes :)

[@michaellang7779]

🚨⚠️DON'T HESITATE BUY THEIR MONOTUB KIT🎉⚠️ I'm a jack of all trades and always DIY everything, but man, I saw your guys' monotub kit with a tub that seems sturdy and just perfectly designed for growing mushrooms. And then it comes the really nice humidifier on sale for 125 bucks 🤯😵‍💫. I didn't even hesitate. I bought it, lol. I absolutely can not wait to start growing in this system! I'll be trying out your substrates too 🤙

[@chaseiguess_music]

might be a stupid question but what do i do after harvesting? like i dispose of all the substrate, clean everything, and essentially completely start back over?

[@NorthSpore]

Exactly 👍 you can always compost your spent cake.

[@jayscoggs8549]

I bought your guys all in one bag. Once it’s all colonized can I add substrate and do this same method in the tub? Or do I just add the all in one to the tub by itself. Thanks

[@NorthSpore]

Yes you can put ShroomTek in a tub and could add substrate for more nutrients / potentially more mushrooms 👍

[@JillKnapp]

Dumb question: When you add the casing layer on top of your fully-colonized bulk substrate, what prevents the mycelium from trying to then colonize the new casing layer? Wouldn't that just make it expend more energy? Would putting bubblewrap over a non-cased substrate serve the same "leaves on the forest floor" purpose? Thanks!

[@NorthSpore]

Casing layers can become fully colonized by the mycelium, a phenomenon known as ‘overlay’ in the mushroom community. To prevent overlay, you want to introduce fruiting conditions/triggers as soon as you notice some signs of the mycelium making its way to the surface. I would not recommend using bubble wrap since it's not breathable. The point of the casing layer is to help maintain a more consistent surface humidity (which helps healthy pin formation), while being breathable to still allow for gas exchange.

[@JillKnapp]

​@@NorthSporeMany thanks! This is really helpful. ❤

[@CalvinSeetin]

Super sexy video all-around. Great production value and graphics! Congrats on ur booming business!!!

[@NorthSpore]

Thank you!

[@hrdcpy]

Lesson learned: Pay attention to the ventilation to avoid CO2 buildup. Don't skip on filters. Also, I'd opt for using a liner versus spray painting the base as seen in other guides simply for cleanup.

[@philliptrapp9456]

Where do you buy filterrs

[@ZenWook]

This was very helpful ❤

[@NorthSpore]

Happy to help 🙂

[@paultogneri9783]

Question: I colonised a all-in-one bag then mixed it with substrate and left to recolonise, but the pins have started, covering the whole surface......no chance to use the casing layer......any ideas why this happened?...thanx

[@NorthSpore]

The casing layer is not absolutely necessary so you should be fine, just keep an eye on them and your settings 🙂

[@cryptohound]

You can use a butane torch and heat the holesaw and it’ll go in like butter

[@mistermistyc2219]

I've seen colonization in one week after inoculation of spores!! Amazing I thought culture worked faster. It's growing in a grain bag, but not the all in one grow bag yet, any suggestions would be great by anyone, I'm new to this.

[@NorthSpore]

Spores tend to take a little bit longer to colonize a substrate so I would give your all in one bag more time. That's impressive your grain bag is already colonizing!

[@Velranius_Ghodrim]

Interesting video, thanks! Can I ask please, if you use monotub (without electronic stuff - humidifiers etc.) for PF tek is it gonna to work please? I mean "set and forget" using physics for FAE?

[@NorthSpore]

For manure-loving legal species, the basic monotub set up without automation can work 👍

[@Velranius_Ghodrim]

@@NorthSpore thank you very much!

[@StrudelNoodle]

Do you use the insta-pot in the background for anything? I didn’t think they work for sterilization

[@NorthSpore]

We really don’t use it much beyond experiments because we have large autoclaves (industrial pressure cookers) as well as smaller but still beefy All-American pressure cookers that would be better for most purposes. That said, as long as the Instant Pot has a pressure cook function (I think this one does), it could be used for sterilizing many different materials. Sometimes we just use it to make dinner 😂

[@alexstone9099]

I have a question, so I want to grow some mushrooms and I can see lots of people using monotubs, is it safe to just grow them indoors without any ventilation? I have just seen in other methods of growing like martha tents and any larger setps they require some way of filtering out the spores, usually a fan with a filter or leading outside. I am just confused if the filter patches are sufficient protection, I am thinking specifically about growing larger amounts so I don't want to be having tonnes of spores in the house and end up getting ill.

[@finnraffertyyy7477]

after watching this video I now understand why forks and spoons are the same thing

[@hellobell123]

Thank god for new!

[@OrginallyOTE]

What kind of substrate is used for albinos or golden teacher?

[@rickson50]

Thank you so much for the video. I'm going to make my own but smaller. I brought your filters and my second all in one grow bag. I'll use those in the tub I have a question. With the filters, they came exposed, is it okay to give them a big spray with alcohol? Will that lower the quality of filtering?

[@NorthSpore]

You can totally spray some iso on there, shouldn't hurt them at all.

[@Sansonius3rDaSlayer]

Great job guys.

[@NorthSpore]

Thank you so much! we're proud of this.

[@em4075]

would medical masks work as a substitute for the filters?

[@NorthSpore]

I don’t see why not! Plenty of folks use painters tape as ‘filters’, so I imagine a medical mask could work. I would recommend using a mask that’s effective at filtering very small particles.

[@Despoina_Nyx]

Something I wanna know. Is it possible to use the spores of the mushroom to grow more or are you locked into having to constantly buy the cultures if you want to grow more of them? Cuz that is legit my biggest problem, the worry about the cost of having to constantly buy and probably import those mushrooms in. If I only have to do it once and then re create them using their own spores then it's a lot easier to and viable for me.

[@NorthSpore]

This is definitely possible, but more challenging. The best way to expand and keep a culture is to clone it! Much easier & avoids any potential issues that can arise from new genetics.

[@gfifplayer4691]

I thought there should be two lower holes in each long side and one upper hole near lid in each short side. And they are one size

[@NorthSpore]

We’ve designed our monotub to have maximum versatility! With more holes it can better regulate airflow especially if you’re growing culinary species that want more air. What you’re describing can totally work though! Also, many differently sized tubs are possible. It’s all about the principles of the tub and whether the needs of the mushroom species are satisfied 🙂

[@Kyle3x]

For a 2.5 lb spawn bag you add 4:1 ratio of substrate?

[@NorthSpore]

Our sterilized grain bags are 3 lbs and we’d usually recommend using 2-3 substrate bags. At 5lbs a bag using 3 of them, we’re talking about a 5:1 ratio. If you want to use 2 bags of substrate (and I usually do this) for a higher spawn rate, closer to 3:1, go for it 👍

[@hellobell123]

Can you guys show us a simpler way without the substrate? Like a ready to grow transferred into a mono

[@NorthSpore]

Do you mean for breaking up kits and putting them in a monotub? We'd still recommend mixing with substrate - otherwise you can also put fruiting block kits in the monotub without breaking them up 🙂

[@A7T043]

I dont have self adhesive air filters available here. What could I use instead? Thanks.

[@NorthSpore]

Hello! If available to you, you could try using some poly-fil and tape as make-shift filter patches.

[@A7T043]

@@NorthSpore Thanks!

[@dinkledaniel]

It would be a blessing if @Northspores could help me with a spore print !

[@NorthSpore]

Shoot us an email at [e-mail] !

[@carlosgiangrasso8505]

Thanks Brother.

[@Sideshowbobx]

"Boomr-Bin" - you guys are killing me

[@brescalofrio1]

gracias hermano

[@NorthSpore]

de nada

[@cacogenicist]

If you're going to use a liner to prevent side-pinning, you want a very thin, limp plastic bag. A tall kitchen bag is ideal, the thinner and cheaper the better (and unscented). Get the cheapest box of store-brand tall kitchen bags you can find. Liners prevent side pins by adhering to the cake, such that there are no little voids along the wall and bottom of tub with favorable microclimates for pinning. A very thin liner will continue to adhere to the cake as it contracts. A thick liner is less pliable and it will not adhere properly to a shrinking cake. And, yeah, the color of the plastic liner does not matter. Light does not cause side pinning -- humid voids do. Even with a perfectly adhering liner, sometimes a few of the little buggers will just pin on the side anyway, making their own room. Better the surface conditions, the higher percentage of the flush will be where you want them to be.

[@pat71987]

Can you add the link for part 2? I can’t seem to find it on the you tube site.

[@NorthSpore]

Here is the link to part 2! kzbin.info/www/bejne/faGUhZSthMp0m6csi=-ksKg9xJmwRzs9vO

[@Bruno-zj1tq]

Genius👏🏻

[@Grader10]

Hard to find shrooms fuk it ima just grow some great vid

[@SusanWarden]

Most videos talk about misting the inside regularly. Did I miss that here? Did he really just mist with water to rehydrate the second flush and not any time during the first flush?

[@NorthSpore]

During colonization, if you're materials are hydrated properly, you shouldn't mist as it can introduce contaminants. Misting during fruiting can be a helpful thing to do!

[@shaunmiller9369]

Do the mushrooms need to still be in the dark when flowering or should you put in the light?

[@NorthSpore]

We recommend ambient light throughout the entire process once in the Boomr Bin 🙂

[@RIDE-o-REBELLION-o-FLOATCAST]

I think I made a slight mistake on my second grow. I added coco coir after full bin inoculation of the monotub but before any pinning showed. My mushrooms are growing all around the outside of the bin but not in the center. Mostly in front of the fan ( i have your full fancy dancy kit). I feel like maybe the coco coir stopped air flow? Because closer to the fan they are growing great and all around the furthest edge of the bin they are also growing great. I didnt do an overly thick layer but I dont know. I tried removing a bunch of the coco coir a few days ago but still no pinning in that central area. Might skip coco coir on the next batch or just do it super thin and wait until i see pinning starting. Your thoughts?

[@NorthSpore]

It sounds like several things could be at play. For one thing, your coir layer could be thick - ½” is all that’s really needed. Along with that, you probably have a moisture issue. Did you hydrate the coir properly? Make sure the humidity is up around 90% inside as well. They don’t need much air, so I think it has more to do with moist microclimates along the edges. The species you are growing definitely matters here, but if you’re growing manure loving medicinal species, I feel good about this advice. Don’t hesitate to reach out to our team at [e-mail] to discuss this further.

[@JonathanYankovich]

How does a liner increase total yield? Serious question :)

[@NorthSpore]

The liner can reduce moisture loss and side pinning, which can increase overall yield on the top the fact that it makes cleanup easier 🙂

[@Philbill96]

Does the Monotub approach also work with Parasol? I wasn‘t able to find anything about growing this mushrooms indoors.

[@NorthSpore]

We don't have any experience growing parasol mushrooms, and it looks like they're a bit easier - though still difficult - to grow outdoors. You could always do an experiment!

[@alextoppen]

I can see issues with isopropyl alcohol and a closed space. Especially when it's a plastic enclosed space that could generate static electricity or Sparks. Why not use a dilution of household bleach instead? Advantages or disadvantages?

[@NorthSpore]

Bleach takes longer to work and has a much stronger odor whereas alcohol dries quickly and the odor leaves quickly. Either or both can work, it's up to preference 🙂

[@md.yusofrozman]

Hello, sir. Is this technique suitable for mushrooms growing in soil?

[@NorthSpore]

Mushrooms typically grow in manure or hardwood substrates - check out our video for growing in beds outdoors for more info 🙂 kzbin.info/www/bejne/b5vSp3yuftOeiNUsi=gVnl2R1d2TmHjbix

[@patriotsongs]

The filters are sized in mm, not inches and 1 inch is 25 mm, which I haven't been able to find./ Where do you get them? And can you grow fruiting blocks in the monotub?

[@NorthSpore]

We sell them on the North Spore website: northspore.com/collections/grow-bags-filters

[@christman25]

Just Google self adhesive filter patches

[@katjastrand3955]

liquid culture is also much cheaper to produce, isn't it ;)

[@elibrooks1662]

thank you so much

[@NorthSpore]

Thanks for watching!

[@vonn2221]

If i use this monotub in the room, could it affect the wall of the room, like become moldy?

[@NorthSpore]

no, that shouldn't happen because it is a relatively closed system. If you've got a super wet wall with exposed wood, fungus will find its way in there somehow anyway.

[@Goodkind-express]

killing it

[@thekingcreeper7724]

ur website won't ship to me, any other filter recs??

[@NorthSpore]

There are many different things that can work as filters. Traditionally, folks will use Poly-Fil (synthetic pillow stuffing) that can be found cheaply at any craft store. You can also use common micropore tape (usually sold at pharmacies) quite effectively 👍

[@marvin216]

I never saw hole placement like this, is there a special reason for that?

[@NorthSpore]

Our hole placement helps facilitate the ‘passive’ nature of the monotub. Their location is intended to promote airflow, pulling fresh O2 in through the top filters and allowing the more dense CO2 to escape through the bottom filters.

[@marvin216]

@@NorthSpore I know this, but I was asking why you choose this specific design with two rows.

[@Nicolas-cl1gq]

How is it that you don't add humidity at any point? not even during fruiting?

[@NorthSpore]

Some species don't need any more humidity than what comes from the substrates, but it also depends on your environment as well 👍

[@carlnorth3034]

Do Northspore dispatch to the uk ?

[@NorthSpore]

We don't currently ship to the UK, but hope to in the future

[@JesúsCastillo-n1h]

what If I only use coco coir without vermiculite??

[@NorthSpore]

Lots of folks use only coco coir, they both have similar functions 🙂

[@user-lb5oo3xm8f]

I like growing button mushrooms

[@NorthSpore]

What's your technique?

[@sebastianroybal1985]

Were could l get that liner?🍄

[@NorthSpore]

We got our plastic sheet from Home Depot 👍

[@swoodc]

14:00 you didnt sanitize your elbow lmao

[@ezl6307]

Video starts at 2:56

[@michaelandersonsa]

intead of making a lining of black plastic, why not just spray paint or duct tape a black strip at the bottom, and on the outside? No plastic = less materials, and therefore less surfaces to get infected or to have to clean. Unless there's a specific reason for the plastic insert...

[@Exows]

is that regular mushrooms or the magical ones?

[@NorthSpore]

those are edible pioppino mushrooms

[@PandoraChaser2]

@@NorthSpore Gorgeous flush they were too! Great video and very nice looking merchandise and range of gear you got rocking now. Best wishes from UK :)

[@Justafinyo]

Man gone through 3 A.I.1. No good, why? I don't have one good excuse and currently I am in the process of letting the mycelium turn into pins which has a couple big patches of white hair like fibrous stuff and no pins are growing as of yet. Is there a person who can help

[@NorthSpore]

Please shoot us an email at [e-mail] and we'll help you out!

[@BigManGerald]

Do you ship overseas

[@NorthSpore]

Unfortunately right now we can only ship within the USA and some things to Canada.

[@CryptoTonight9393]

Important tip: DO NOT FLAME STERILIZE YOUR NEEDLE INSIDE A STILL BOX WHERE ALCOHOL HAS BEEN USED!!!! you are very likely to cause an explosion!!!!

[@Skeletontiger]

Do not flame sterilize anything at all lol.

[@NorthSpore]

100% great advice!

[@m99099]

What is the seed??

[@NorthSpore]

Are you referring to the grain in the grain bag? If so, it's millet 🙂

[@trainingtrix]

❤❤❤❤❤

[@NorthSpore]

❤

[@Yonnie6996]

soooo we are not gonna mention that u need to cover up those holes (at least the top ones) during colonization? then cover small and un cover large to fruit. kind of a huge step u missed there buds.

[@NorthSpore]

Thank you for this feedback - we will see if we can add a note to the video somehow. While we mention it at the beginning, it probably would've been helpful to mention again while inoculating the monotub even while the filters are shown on the tub 👍

[@firstlastqaz]

What do the holes get covered with? I already applied the filter patches to my bin, which I have set up and not used yet.

[@RobotSpaceGirl]

❤❤

[@NorthSpore]

❤

[@rerikm]

Is this even cost effective? that's a small batch of produce.. isn't it??

[@NorthSpore]

It can absolutely be cost effective. For one thing, you might be growing species that can't be found in stores. For another, they will be super fresh!

[@TommyTumma]

This guy fucking RULES!!! Does North Spore ship to thailand? I need a whole kit with spores. I have dried mushrooms here but I don’t think I can spawn a colony with dry mushrooms. True?

[@NorthSpore]

Unfortunately at this time we can only ship most products within the US and Canada - but hopefully more in the future! Cloning from dried mushrooms is possible but not recommended - it's best to do so from fresh tissue 👍

[@almondflour4785]

I wish you said "technique" instead of "tech"

[@Shaftley69]

That wasn’t reverse, the hole saw was spinning clockwise which was forward. You should not only drill them in reverse, but partially drill from the inside first to score the plastic on both sides then finish the hole in reverse from the outside going in. Just my 2cents as a guy who’s drilled a few hundred plastic totes over the years. Cheers mate!