Fish Required To Grow 400m2 of plants | Ask the Aquaponics God Ep34
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- Опубликовано: 5 сен 2024
- The School of Aquaponics
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My compliments, this was your best video yet. Working my way up from 1 and looking forward to the rest. Can you tell me where to get the feeding rates for different types of beds?
Excellent, Definitely going to watch this again and again and again, then I'm going to understand it all. Thank you, very very helpful.
I've watched this 5 times and it's just.... WoW.
Need to write a book. This is good stuff. Thanks!
Hi, ít's very exciting. but i thing daily feed (2:06) can estimate by another way.
if i get lettuce grow time as 30 day,
feed rates as 60gr/m2/day (every day feed)
we have 280m2 ==>we can feed (280/30) *60=560 gr per day.
thanks for your video, i love it!
Hey Hieu, thanks for watching. When you calculated (280/30) that makes the calculation seems as if you only have 9.3m2 of growing area. This would be an incorrect way of determining feed amount because that calculation drastically underestimates the required feed input. The correct way is 280m2 x 60 to get an approximation of feed requirement per day. No need to divide by 30. Hope that helps.
thanks alot. its too technical but it give me an idea that prior to starting any aquaponic system, you must know the mathematic of it first before you fall into failure & not knowing why.
Hanie Mee Measure the ph of amonia and nitrite levels, they should be zero before adding the fish because they are toxic for the fish. Add fish after one month of starting the system.
Your presentations are very informative and well structured. You arouse interest and concentration. You are simply good
Thanks for making this video.. I like seeing the numbers side of it.
Great Bro
I have 2 questions here
1- What is the relation between the number of harvests and number of tanks ?
2- i have an information from one documents related to the FAO that you will need 1000 litre (1 m3) of water to grow 4 m2 of plants which mean that 280 m2 plants will need 70 m3 (280/4) of water ?
thanks to clarify these to me
and thanks for the great effort you are doing here
Problem is that Nevada has made Tilapia an invasive species and you need a commercial license and a permit to own and raise it. Aquaponics options are thus limited to raising pets in my state as growing out trout and other cold water fish take years for harvest. However, koi and goldfish are a couple of the higher producers of nitrogen which means one doesn't need to stock as many for the same benefits and after a year or so of grow out an investment of $5-10 per fry can lead to $50-$100 for a year old koi of show quality.
I have question:
if the total annual weight gain of fish is 3618kg, then the actual weight of fish (biomass) is supposed to be 4020kg (3618X500/450).
so that, the min water volume of each tank (using stocking density .5lb fish/gallon) is supposed to be 2037 gallons (instead of 1834 gallons) or 7712 liters.
please correct me if I miscalculated. thank you
what is the difference between FCR and FER?
How do you use the FCR to work out the FER? I'll be using rainbow trout (talapia is a noxious species here) which has a FCR of around 1.4-1.5, but not sure what the formula to find the FER using that conversion ratio.
Thanks mate :)
You put out some quality content. First time math has ever been fun! Many thanks. A few (I hope) basic questions. Where does the .59 FER come from? I will not be stocking with tilapia, but with trout rather, as I am from the Midwest. To complicate matters further, being a small scale, residential operation; I will be (attempting to) formulate my own dry fish feed as well as supplement with live feed (minnows, BSFL, mosquito larvae, daphnia, zooplankton, mealworms?, etc). I have seen claims that dry pelletized feed typically contains a 0.6 - 1.1 FCR, while live feed and animal meat ranges somewhere between 4-9 FCR. Can you validate any of this? Knowing the equation(s) you used to solve for both FCR and FER would be helpful in my mathematical endeavors. Even some sources leading me in the right direction perhaps? Thanks in advance. Keep up the good work.
he is referencing scientific data, most likely the UVI model.. University of Virgin Islands. Go check it out.
Brilliant, thanks.
I have been following you and your vidios are just great. Thank you. How do I figure out the growing area in a NFT or VERTICAL system? So I can get the right amount of fish
well, your calculation has some wholes. So far its right to go via the feed consuption but you leave out that this consumption is depending on the body weight of the fish itself, usually 1-2% of the body weight. In your calculation the fish in tank one seems to consume the same amount of feed as in the one that gets harvestet next. So a fish in weight about 110g shall consume the same amount as the targeted size of 500g? For me its more a fifth then. Its ok to use for the calculation an average FCR but this one also differs, in younger age this one is much much higher, it reaches in good environment nearly 1:1. It also seems that your fish produces 100% of their feed to the useful Amonium you leave complete out that they produce shit to. So in all, you end up with a much higher needed amount of fish as you calculated ;)
Hello, I have one question
if the total annual weight gain of fish is 3618kg, then the total annual weight of fish is supposed to be 4020kg, isn't it.
so that, the minimum water volume per tank (using 4 tanks and stock density of 0.5lb per gallon) should be 2037 gallons (instead 0f 1834 gallons) or 7712 liter (instead of 6942 liter)
please correct me if I miscalculated
The mathematics in this video makes my head spin. Going to take a couple dozen watches to fully digest this.
The most important thing to take away from this is knowing what you expect to produce. Without an end game, you can't develop the play by play tasks to achieve your goal. This gentleman has the answers, if you ask the right questions, and they will be based on a realistic objective.
For having minimal design input you definitely provided some useful numbers to consider before "jumping in". I'm looking at vertical growing, and will search your videos for input. Thank you, even though the "God" moniker offends me. Especially when you are playing in his realm. But teaching to survive is why he gave us voices. Have a great day.
Seriously? Feed 16kg of feed a day? This doesn't seem correct.
Hi there, I'm in the process of setting up my own aquaponics system. Your vidieos are a big help for that! I have a question regarding your calculations. The tank volume that you calculated is the total tank volume, not the volume per tank, right? In my opinion we had to divide it by four (if we use four tanks) to get to the volume per tank or am I missing some ratio there?
Thank you I really enjoy and learn from your channel.
I have a deep water system, i have 12 beds with size 1.7*13 m. I have 4 fish tanks with size( 7.5 qm ) each
. Do you think that my tanks are enough to grow the beds plants that i have. And what is the proper size of bio filter (i have a plastic filter) that can help in breaking the ammonium.
You dont take into account that the feedportion must vary. Like you wouldnt feed what you feed to 50g fingerlings to 600g grown fish. Shouldnt the feed be exponential rather than constant?
Yes, these are the calculations for a system at capacity not at the initial stage.
With varying different stages of fish, eventually the feeds is going to be constant. E.g Tank 1 will have fingerlings, tank two Fish at 100 grams, tank 3 at 200 grams etc until the last tank. When the lat tank harvests, fingerlings will be stocked and the cycle repeats its self.
I don´t think the feed rate will be constant as it will increase as the 6 weeks go by. At 5 weeks, the fish in each tank will be larger than they were at week 1. The amount resets every 6 weeks, but the average would be based on the weight of the fish at the 3 week point. However, the calculations in the video seem off because they are based off of each of the tanks having fully grown 500g fish in them, which they will never have, at most you will have 1 tank with 500g fish for the last couple days of the 6 week cycle. but who knows, I am probably missing something.
I filled the deep end of my pool 3000 gallons and 60 baby talopi fish threw in some pond plants. how much alge and duckweed would I have to feed them to get a one pound fish per day. right now I'm feeding them a hand full of alge every day because that's all I'm producing. it took a mouth to double in size
hello sir. so I have only 9 sq meter of space for my plants, I did the estimate while following your video and came up with 245liters of water for every 9 square meters of lettuce plants..am I correct? Thank you so much for the tutorial!
Anyone have a taste preference between: talapia, trout or perch? (and which variety of each do you enjoy?)
Never tasted any of the options other than Tilapia, but am open to try!
How many plants can one fish grow
Thanks a lot , what is the "initial stocking weight"
Initial stocking weight is the weight that your fish are once you place them in the grow out tanks. If you get them from a hatchery they will have some sort of weight on them already. You typically will wait until your fish reach a certain weight before stocking them in a grow out tank.
FER 0.59
Every pound of food 59% coverts to fish biomass
Why divided the kilo instead of the pound on the coefficient
Since this portion of the equation is based on a percentage, it doesn't matter if we lbs, Kg, or Grams because the answer is still the same as long as we keep the conversion metric constant. 1lb equals 0.454kg or 454grams. We still get the same results. We divided the .59 with Kg because that was the metric used in that portion of the equation.
I live in Fiji and have a 35m x 15m x 1.5m deep pond that is full of Tilapia. Can I use this water directly to an aquaponics set up. I am looking at setting up something next to the pond. Do I need to treat the water.
Would you be so kind as to direct me to where you reference this information from?
ok , what do you mean by the DWC Feeding rate ?? is it water ?? and why you used g and not liters ?
That's how much you need to feed the fish. Some plants need fewer nutrients (that would be 60g/m²) and some, like tomatoes, need more (that would be closer to 100g/m²).
ValerieRaya ok , clear . But do we need to change some of the water in the fish tanks ? , I mean could plants restore the water quality , or we need to dump some of the water and replace it ?
Thanks
Fantastic sir your vedios I need some help I had 900sqtr poly house newly errected I want to convert in to Aquponic system. For beginning what to do &how to proceed.expecting reply sir if possible send me your mail id