However, if your not running aquaponics and you need an ammonia sink, then perhaps recirculating water from the fish tank through a large shallow pond plant bed in a shady location and a little aeration will grow a good amount of duckweed that you can then scoop off and give to the fish regularly.. Duckweed is one of the recommended alternative foods, especially for tilapia. it can be grown organically in the fish pond itself. with proper care, you can cut down on the amount of processed fish food that you need to use. duckweed is simple to grow and serves a vital role in recycling nutrients within the aquaponics system.. Harvesting and feeding duckweed to jade perch - autopot aquaponics.
They feed on pellet food, duckweed and other veggies in the aquaponics system. yellow perch fish: this type of fish is very good to grow in the recirculating systems. they prefer being in cool water and are very much adjustable to the changes in ph level of water. these fishes feed on the pellets and other veggies.. Our first fish choice was channel catfish which turns out to have been a very good choice for outdoor aquaponics here in central florida. channel catfish can take the heat just as well as tilapia yet they can also handle the cold and will even keep growing well below the 70 degree f water temp that usually slows tilapia down.. The fish food we use for both catfish and tilapia is rangen 1/8” floating catfish food. you can use any floating food that has about a 30% protein, 6% or more fat content, but try to find a fish food that comes in the nice small 1/8” pellet size, as we have noticed problems, both with acceptance by the fish when they were fed larger sized pellets, and with the growth rate and health of the aquaponics system..
