Depends on the fish species. I find that for my clowns, omega one garlic infused pellets work, with occasional feedings of mysis or brine shrimp. Other than that, they pick on the pods and mysis living in the tank.
I’ve been on this kick lately and I decided to make my own frozen food. Used scallops clams shrimp and salmon mixed with selcon. My fish go insane for this mixture and it’s so healthy for them. They also get pellets flakes and mysis for snacks