this post was submitted on 26 Mar 2026
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Gotta up your hydroponics game bro! Raise fresh water prawns are bigger and you can grow hydroponic organic pesticide free greens over them which are sustained by the nutrients from the prawn waste.
They call those setups aquaponics. It's a really cool system and one I would love to have as an indoor farming setup some day when I can finance it.
Currently I die a little inside when I do aquarium filter cleaning and water changes. The amount of nutrientns I cannot re-use is saddening. So much good fish poopy going to waste.
Another cost consideration is the food safety licensing and whatnot you would need to have.
If you pick up coco coir (an inert medium for hydroponics when plants need a bit more rooting structure) you can dump that sludge right over top to water whatever plant you have growing in it.
If it ends up getting kinda gross, take it outside and hose a bunch of water through it to rinse it, good to continue. But mostly it just causes the coir to break down a bit faster than it otherwise would, due to the bacteria, so this is basically like adding compost continuously.
Doesn’t work for every plant, but does work for a lot of them! I have potatoes in such a setup right now, and it’s pretty swanky.
I use my used aquarium water for our fruit trees, and they love it.
Wow! Tell me more!
You can add a third tier to the system: fresh water tilapia. The waste from the tilapia feeds the shrimp and the water from both fertilize the plants. The idea is to replicate natural nutrient cycles. The whole setup can be done outside in warmer climates, or indoors using LED grow lights. I've seen outdoor grow setups done in old in-ground swimming pools.
I was going to say CRAYFISH BOTTOM FEEDERS but in trying to educate myself i learned that they would be competing with the shrimp. so instead of shrimp farm, Crawdad farm! you do one, i'll do the other, we'll be neighbors, we can ride ponies to work, mine will be named Snuffles and yours will be named Clip Clop (Clip Clop loves salt licks so don't let her near the tank) and we can put it right next to the cheesery and cafe that i just decided is part of my fantasy.