Fish food

[eon aquatics]

i also feed them shrimp

 

[duanes]

Depends on what kind of fish, and what their diets might reflect in nature.
Carnivores get pellets recommended for carnivores, and also get more protein rich foods (not mammalian or avian meat).
Omnivores get a general combined pellet that reflects everything from medium high protein to veggies.
Vegetarians get a high in Spirulina or algae based pellet like AlgaeMax, and some real veggies.