I feed my fish Top Fin Color Enhancing Betta Bits I got at PetSmart. Initially "Paprika" flared at the food, but he soon ate it, and really enjoys it now, too. The "Bits" are pellets, a little large in fact for a betta, but I was pleased to see shrimp meal and fish meal are the first ingredients on the list. I have fed my bettas the Aqueon pellets, but they have a tendency to sink, which the Top Fin pellets do not. I have not tried Hikari, but it comes well-recommended. I tried Atison's Betta Pro, but I ordered the larger size, not realizing just how much food that is, and the label said to discard an open container after six months of use. Does that seem right? The Atison's pellets (brine shrimp embryos) were much smaller than I was used to, so I often put too many into the tank; the pellets don't develop that white fuzz on the bottom, but they do decay if they remain in the tank uneaten.