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NFT beds as solar water heaters?

Posts: 3656
Location: Kansas Zone 6a
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In hotter climates, hydroponic and aquaponic growers have problems keeping NFT (nutrient film technique) systems cool enough--the trickle of water heats too much and tends to cook roots, even with white pipes.

My problem is I want to keep tilapia in a relatively cold climate and don't want to heat a greenhouse.

The problem is the solution....

What if I make black pipe NFT pipes high in the system mainly as the solar heaters--they will be planted in cooler seasons and left empty during the summer. I was thinking of tying them into the air circulation system since they will be at the upper layer of air with a bunch of intake holes to pull in warm air and circulate it through the mass.

Posts: 14
Location: Southern Maine
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Sounds like you want something like this. Many videos for aluminum can solar heaters, just be careful, they work really well, get really hot, and you'll want a thermostat setup so as not to cook your fish.
Posts: 136
Location: Sunset Zone 27, Florida
forest garden trees rabbit
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no it doesnt sound crazy. take pictures!
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