INTENSIVE SHRIMP BIOFLOC SYSTEMS - WATER QUALITY #14 |

[@mariasg6644]

Your channel is literally a GEM! Short & super-clear expert videos, helped me a lot to figure out what else I should learn :) All the best!

[@hashtagfish8542]

Thanks Maria it means a lot

[@jaswindersoin4410]

Very logical well explained . You are an inspiration in the field of Biofloc technology ! Bravo

[@kirkrivera8917]

This was the best video i have ever seen regarding bioflocs technology. Thank you so much for the very simple and yet so powerful strats on starting bioflocs.

[@james_studio8065]

Thank you very much for this very informative video!

[@TheKimmiG]

Finally #14 👍🏼😁

[@hweetoong4909]

Thanks Drs. Jose Domingos & Giana Gomes, will try it out and feed back to you guys.

[@hashtagfish8542]

Our pleasure!

[@Danah-qr5sv]

Thanks dear , any video about production shrimp in RAS system

[@09cyberguy]

Wow, yiur channel is very informative.. can i ask how often you add calcium hyroxide is it every feeding or every night?

[@1358sob]

Big Thanks for this great videos.

[@QUARTZPH]

What's the best % body weight for Daily feeding rate computation for Tilapia? I'm planning to conduct my research about Molobicus.

[@shaburagarden6825]

Hi, I would like to thank you for your videos. They are very useful. Just out of curiosity, doesn't Molasses have 24% carbon instead of 50%?

[@hashtagfish8542]

Hi, it depends on the brand and how much the manufacturer has cooked the sugar cane juice

[@moelroby7906]

Amazing information. I saw people adding 1.7kg of salt for M3 . Is that good or bad . What do you think as well of adding probiotics as lactobacillus ? Thank you in advance

[@hashtagfish8542]

hello, depending on what is the level of salinity in the system, which should not be below 10 ppt for intensive system. 1.7kg of salt only increases 1.7ppt, so it does not make any difference. Not bad for the fish, just for the pocket. And adding probiotics of a reputable brand, yes, absolutely. Lactobacillus are better to be added in the feed rather than in the water.

[@moelroby7906]

@@hashtagfish8542thank you for the reply. can I use the water of the biofloc to water my plants knowing that there's salt and water is alkaline because of the caco3 ?

[@joseantoniosantosdom]

Hi salt, kills most plants

[@jaswindersoin4410]

Would you please suggest all the equipment required for Biofloc success in shrimp and tilapia.

[@santosreynaldocaguavite8537]

Hola, excelente información , gracias, ? Puedes hacer vídeo de como formular y elaborar alimento extruido artesanal balanceado para camaron vannamei hecho en granja a bajo costo ?, muchas gracias, saludos,

[@hashtagfish8542]

Hi SANTOS, we'll have videos on feeds coming. Always be cheaper to buy from a feed mill, you can't achieve the fine grinding of ingredients needed and the price you will pay for ingredients will be much higher than what feed mills pay buying in bulk. So you will end up with a much more expensive and bad feed...

[@santosreynaldocaguavite8537]

@@hashtagfish8542 muchas gracias, podrías explicarnos acerca del equipamiento tamizador, molino de granos, mezcladora, extrusora, secador , todos de bajo costo, y receta para formular a 43.5 % de proteína para vannamei, me encantaría aprender a manufacturar alimento, debería de salir todo bien ?, gracias

[@hashtagfish8542]

Hi SANTOS, my apologies, I have no knowledge about that, this is not my specialty....but for vannamei protein should be in the 30 to 35% range.

[@santosreynaldocaguavite8537]

@@hashtagfish8542 muy amable, muchas gracias

[@FactYouDude]

Hi. What should be the salinity level for shrimp in biofloc?

[@ProfessorMoisésQuadros]

Muito bom! Parabéns!

[@rabiaakterahasan]

Excellent video

[@benjoartemyo3955]

Thank you so much for the information!!!!

[@jeffreymartinez9125]

Can i add calcium carbonate instead of hydoxide?

[@gunsNgunsss]

We observed dead shrimp every time there is a heavy moulting in our biofloc tank. Almost 20 dead shrimp in a day coming into the feed check tray. It's a 20K litres tank, density is 400 per cubic metre. The pH is 7.7, alkalinity is 170, salinity is 8 ppt (added salt to fresh water), Ammonia is Nil, Nitrate 0.5. The shrimp seems to be active but not taking much feed. Are we missing anything? Clueless why the shrimp are dying even the water parameters seems to be fine. Appreciate your suggestions. Thank you..

[@SamuelLimawan]

How to maintain nitrite below 1 mg/L? In my tank ammonia is always zero but the nitrite up and down. Sometimes very low (zero) and sometimes very high. I thought the nitrifying and biofloc bacteria have been establish but I don't understand why the nitrite up and down. Thanks in advance

[@mkanil65]

Really helpful ❤️

[@luckyaquasl3804]

Thank you very much. I am doing KOI Carp (ornamental fish) Is possible to growing with the biofloc system? Please answer me. Thank you 🙏

[@hashtagfish8542]

Hi, probably but we don't have experience with it

[@luckyaquasl3804]

@@hashtagfish8542 thank you 🙏

[@alexgunawan98]

Question, do you have any opinion about Total Organic Carbon and Biology Oxygen Demand in Aquaculture ?

[@hashtagfish8542]

yes I have, after 24 years in this industry in various capacities. It is good to understand general concepts and theories, and for researchers and academics like me to be able to scientifically demonstrate findings and get our papers not rejected by mean reviewers. In practice it is all about keeping DO close to saturation, or above 5 mg/L and the culture species, microbiome and environment will be fine !

[@raviprasad2156]

As culture progress did you saw any sudden spike in nitrite levels ? If yes, how you managed it and if no, then can you please tell the acceptable level of nitrite at which(vannamei) shrimp won't face problem wrt salinity (from 5 ppt to 15 ppt).

[@hashtagfish8542]

If water is matured no spikes in nitrite expected unless you have dead zones where organic matter accumulates. Nitrite as low as possible (

[@poisanmok1987]

My pH seems stable at 7-7.5 and TAN is 0. I noticed 1 dead shrimp in the morning. Alkalinity is around 250 mg/L. What could have gone wrong?

[@richresources2922]

For a 10 meter diameter tank with a height of 1.2 meter biofloc how much HP do we need for the oxygen

[@joseantoniosantosdom]

The answers are in the videos!

[@paultaglucop4881]

Good day sir from philippines, do you have ebook for shrimp and tilapia biofloc culture? Can i purchase?tnx..

[@hashtagfish8542]

Hello, we don't have e book yet. Itvis a good suggestion, thank you

[@gunsNgunsss]

In India, in most of the states, special permission to be obtained from the government to use molasses. So, we are using "Granulated Sugar" as a carbon source. We haven't seen any issues with that so far. What do you think of using Sugar in place of molasses?

[@hashtagfish8542]

yes sugar is as good as molasses, go with what is available and cheaper in your area. Thanks for sharing !

[@gunsNgunsss]

@@hashtagfish8542 Thank you!

[@poisanmok1987]

can i use calcium chloride instead of calcium hydroxide? if yes, how much to add?

[@hashtagfish8542]

Calcium Chloride does not raise the pH or alkalinity, so no, cannot use as substitute

[@ralph-g4d]

is green algae benificial to shrimp. and is still posible to mix with biofloc.

[@joseantoniosantosdom]

Algae is part of the floc, its not only bacteria. And always there is light there is algae

[@binoycheriyan2640]

Could you share the fresh water culture preparation parameter details pls ? And measures and practices for moulting period that you follow.

[@hashtagfish8542]

Hi, it is similar but need to check hardness. Also some salt is required in intensive systems to minimise nitrite toxicity

[@acesoriano4615]

Sir, what probiotic can be used to add to the feeds and molasses? Do you have also a formula for shrimp feeding during the culture period? Thank you

[@hashtagfish8542]

there are many brands of probiotics, some work, some don't. We can't make a recommendation here, but we go with brands that have been in the aquaculture market for 10 or more years. We will make a video about feeding.

[@richresources2922]

Can check for 40m x 40m pond how many HP is needed in order to have enough oxygen

[@joseantoniosantosdom]

1hp per 500kg of shrimp, so you calculate backwards. Provided you are experienced, you can target 3kg per m2. In your 40x40m, this is about 10hp

[@richresources2922]

@@joseantoniosantosdom it will be around 240000 shrimp with 20g is enough for the oxygen.And we need to do partial harvest in order to have have enough oxygen right

[@joseantoniosantosdom]

Do you already have your pond? I always suggest starting wiless density

[@julzchung8499]

Can a pilot biofloc system be used to culture shrimps from nursery to harvest in the same tank? Let's say a thank of 4000 liters? Also how much shrimp can be in a 4000 liter tank?

[@joseantoniosantosdom]

Hi Chung, yes of course. Density depends on how good your system and husbandry skills are. I would stock from 800 to 1000 shrimp maximum .

[@leomelpasquin2521]

Hi, may i know what equipment can we use to measure the floc?

[@joseantoniosantosdom]

The 500ml cone in the thumbnail!

[@leomelpasquin2521]

@@joseantoniosantosdom Thank you Sir. 😊🙏

[@Rinto-tc4bn]

Hallo i am from indonesiaCan't you tell me how to increse alkalinity in brackist water ? Tks

[@joseantoniosantosdom]

Hi, you will increase alkalinity with liming materials or sodium bicarbonate if you ate dealing with smaller tanks

[@charleskurniawan2950]

Is it profitable to do biofloc farming in Australia?

[@hashtagfish8542]

Why not? Fresh local prawn always get high prize in AUS and you can have it close to major cities instead of having in North Queensland and have to transport all the way down to those major markets far away

[@poisanmok1987]

I'm interested in growing shrimps. Can you share your source for L. Vannamei PLs?

[@hashtagfish8542]

depends where in the world you are and hatcheries in relatively short distances. Most importantly is to check the PL quality (watch our video on that), and that they are SPF. Good luck, start small

[@poisanmok1987]

We are in Singapore.

[@TheIgnoreme]

@@poisanmok1987 Choose a site with good water condition,salinity above 10 will do

[@munandarmukhtar4554]

every 1000 g of feed requires 650 g of molasses to get a c/n ratio of 15:1... (1000*0.35)*0.16 = 56. (56*15)-(56*9.2) = ( 840-515.2) = 324.8*2 (50% carbon molasses) = 649.6 g molasses.. so, if we apply 2 tons of feed or 2000 kg for one grow out season, then we need 1.3 tons or 1300 kg of molasses. is this calculation correct?

[@hashtagfish8542]

Hi see video at time 5:35. Add molasses to correct Ammonia as described, and as a starting point, , don't worry with these theoretical calculations

[@TheKimmiG]

Hi friends, How can we manage mineral in biofloc system? High population means high mineral needed. Do we need additional mineral to cover that?

[@hashtagfish8542]

no need additional minerals, for shrimp it is good to have some marine water at least 5 parts per thousand (ppt) of salinity as it decreases the toxicity of nitrite (more risky in freshwater)

[@TheKimmiG]

I thought for shrimp moulting process need a lot of magnesium and calcium from sea water. But in biofloc (very less water change) means not enough mineral in intensive systems.

[@hashtagfish8542]

@@TheKimmiG like we explained in the video, as long as alkalinity is > 150 mg/L there will be sufficient calcium for molting and also to keep pH buffered.

[@TheKimmiG]

@@hashtagfish8542 Thanks a lot.... that's new for me. Your channel is really educative. Hopefully we can meet someday drink coffee in Singapore ;)

[@hashtagfish8542]

you in Singapore too?

[@davidtan1450]

Hi Gianna, you need more protein for your weight gain

[@aasabioflocdhenkanal2343]

How much caco3 or dolomite should be used to maintain the alkalinity n ph

[@hashtagfish8542]

Agriculture limestone is less reactive and doesn't raise the pH as much, it tends to keep pH at neutral (~7) so not ideal you have to use quite a bit more (1.5 to 2x), even more dolomite because it has less Calcium. Better is to use sodium bicarbonate, but more expensive than Calcium Hydroxide.

[@aasabioflocdhenkanal2343]

@@hashtagfish8542 thank u for ur information

[@aasabioflocdhenkanal2343]

@@hashtagfish8542 but calcium hydroxide is not soluble will it not create any problem for shrimp

[@hashtagfish8542]

@@aasabioflocdhenkanal2343yes soluble but as explained in video, mix in bucket first and then splash well over the pond. take care not to burn your skin please

[@aasabioflocdhenkanal2343]

@@hashtagfish8542 thank you