19/8/2015 · 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