I think you'll be best with pellets and live treats. The likely eat here or there during the day, in the size space you have and given food source its not the same as the fish feeding very lightly over the say a 1/8 mile stretch of area. You likely should heed to the consensus here and make pellets a main stay and treat him with quality live stuff you might raise up.
I'm going to buy snails shrimp krill and mabey some type of craw fish that reproduces Asexually and feed him theses and once a day pellets
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