Water cooling using aquaponics tank

Ken Beck

Well-Known Member
My garden is currently under a significant amount of construction at the moment, and building is a slow process for me with my ailments. I'll have more videos on this soon.

Last harvest was March @ 1.45gpw, using aeroponic-soil hybrid, aquaponic system.

I meant the fish growth rate but thats good info too lol. How long have you had the system running?
 

Dumme

Well-Known Member
I meant the fish growth rate but thats good info too lol. How long have you had the system running?
This is a new system as of last year. I have not harvested many Trout as my stalking license expired Dec 2016. Most of them are about a year old now, 2-4 pounds.

In Maine,Trout are controlled,and require a license. They're also seasonal stalking in my area.
 

ttystikk

Well-Known Member
This is a new system as of last year. I have not harvested many Trout as my stalking license expired Dec 2016. Most of them are about a year old now, 2-4 pounds.

In Maine,Trout are controlled,and require a license. They're also seasonal stalking in my area.
Same here in Colorado. Warm water fish will be better for me as I wish to use waste heat from my LED lights to warm the tanks.
 

Ken Beck

Well-Known Member
Same here in Colorado. Warm water fish will be better for me as I wish to use waste heat from my LED lights to warm the tanks.
The only way i can get trout to work is to move the waste heat upstairs to the room with the tilapia. Pretty easy since it will be right below that room. Just have to insulate the lines from the lights up to the room.
 

Ken Beck

Well-Known Member
So i had another branch top that was broken by children this time when i was rearranging my grow bed so i put one in yesterday inti the grow bed and i will see how long this plant takes to root. This time it is jalapeno plant. Also making another grow light using 5000k citi 1212 90cri led cobs. 4 of those on a heatsink in parallel to increase efficiency. I could fit 5 though on one heatsink. I also have another 4000k citi 1212 to add in parallel to my current light setup.
 

Ken Beck

Well-Known Member
Ok, so i learned a valuable lesson about trout. Those fish can jump HIGH! I had 60% of them die from jumping out before i could even get together a net to keep them from going out. And the sides are at least a foot up from the water level. So if anyone is ever looking at trout to grow, a net top or cover is a necessity or else you will wake up every day to dead fish on the floorimage-20170610_115247.jpgBtw, they grow much faster than my tilapia do.. granted i have blue tilapia which are some of the slowest growing tilapia, but its unreal how fast they grow in controlled conditions. They are just very picky fish and will die if anything is off.
 

Organic Miner

Well-Known Member
Ok, so i learned a valuable lesson about trout. Those fish can jump HIGH! I had 60% of them die from jumping out before i could even get together a net to keep them from going out. And the sides are at least a foot up from the water level. So if anyone is ever looking at trout to grow, a net top or cover is a necessity or else you will wake up every day to dead fish on the floorView attachment 3962845Btw, they grow much faster than my tilapia do.. granted i have blue tilapia which are some of the slowest growing tilapia, but its unreal how fast they grow in controlled conditions. They are just very picky fish and will die if anything is off.
Are they still edible off the floor? Look like keepers! Lol.
 

ttystikk

Well-Known Member
Ok, so i learned a valuable lesson about trout. Those fish can jump HIGH! I had 60% of them die from jumping out before i could even get together a net to keep them from going out. And the sides are at least a foot up from the water level. So if anyone is ever looking at trout to grow, a net top or cover is a necessity or else you will wake up every day to dead fish on the floorView attachment 3962845Btw, they grow much faster than my tilapia do.. granted i have blue tilapia which are some of the slowest growing tilapia, but its unreal how fast they grow in controlled conditions. They are just very picky fish and will die if anything is off.
The idea that a cold water fish grows faster than a warm water species known for its productivity gives me pause;

What temperature were your tilapia kept at? How about these trout?
 

Ken Beck

Well-Known Member
The idea that a cold water fish grows faster than a warm water species known for its productivity gives me pause;

What temperature were your tilapia kept at? How about these trout?
Tilapia are being kept at an optimal 80-82°f. Trout at 63°f. The trout are rainbows. Here is where the conversion ratio makes a drastic difference, I feed the trout the upper end of what they can take daily, 4% of body weight for food intake and 90%+ is being converted to weight gain. My blue tilapia are about 1.4-1.5:1 so at best 71% conversion and a maximum feeding percentage of 4% at their growth stage. Now when younger the tilapia can grow faster and convert as good as 1.2:1 but as they get older their conversion ratio drops. This is why if I was to raise white Nile tilapia, they would reach maturity faster because their conversion ratio stays at the low end much longer and I can keep feeding a higher percentage for longer as well. I will grab about 20-50 of them soon just to see how some of the fastest growing tilapia perform. I think it will be a close one. Out the gate I know the tilapia grow much faster. And they are definitely cheaper to feed. As they get older they prefer vegetables which is dirt cheap to feed straight from plants growing in the system. I mix duckweed and scrap vegetables along with a high protein fish meal based pellets. The trout will ONLY eat meats like the high protein fish meal based pellets, worms, and small fish like minnows.
 

Ken Beck

Well-Known Member
So I am looking into making a more compact system that can go anywhere in an average home and grow quite a bit. Definitely warm water type as I can put the heat from a cob directly to the water. Using 55 gallon food grade blue barrels. I'll upload a quick sketch of what I'm talking about design wise but onto the parts list. 2 barrels, one cut in half from top to bottom to make 2 curved barrel halves. That half will be flipped with the curved part down and grooves made into the other barrel to seat the half barrel on top and a gap cut below it to have access to the barrel tank underneath. I was looking into smaller quieter pumps that only use 5-10watts to pump upwards of 100gph to cycle water through the grow bed and using a small radiator in the tank with a small pump for cooling loop and a flexible arm to mount a single led cob with cooling lines and power lines across to change position easily. Power supply for led would be a 36v 72w brick wired to the cob to keep it running at a safe power level yet enough to grow anything within its footprint. The cob will have a mounted reflector on it as well to contain the light into the barrel area. All said and done the system should be around $100 total including timer and power strip, mounting equipment, and all electronics including timer. I'll go more into detail once I have everything sorted and ready to order list of parts.
 

Ken Beck

Well-Known Member
Alright i have a list of parts. $150 total. I did a bit of rounding so it isnt exact but it at least is a close number. I attached a spreadsheet i saved as a pdf to see.
I know i said i would make a drawing, but i have no artistic ability so i will just skip to doing pictures as i do it. I already acquired 3 food grade barrels at $12 each (2 systems total). All used for teriyaki, apple vinaigrette and soy sauce.. i didnt even know those came in barrel quantities lol.
They may take awhile as i am doing this all on the cheap so shipping is a tad slower. I have 3 systems now and I paralleled the new catfish tank and the old tilapia tank together so i could skip the wait period for the grow bed to reach a stable bacteria colony to convert ammonia in the new system. Not going to lose the fish and couldnt wait any longer to get the fish as this was the last batch for catfish until fall. Trout tank in the basement is still holding steady at 64°f and they are doing good. The trout are wickedly crazy eaters and make the other fish seem lazy and boring lol. Current batch of tilapia are almost of harvest size now with the biggest hitting 11oz in size. Bigger suprise is how fast the koi i put in only a month ago is growing. It may be larger than the biggest tilapia i have now. I got it at only 4" in size and it is now over 6" and fat.
 

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