I feed sinking shrimp pellets, tetra min tablets, omega one flake, tetra colorbits, and my two favs, hikari sinking wafers, and hikari sinking carnivore.
I feed them shrimp pellets, algae wafer bits (not really for carnivores, but they eat them), and hikari sinking carnivore pellets (a little pricey). That along with frozen bloodworms, live earthworms and frozen silversides.