Kewl - keep him well fed. There's nothing worse than a fish thats dented in over the eyes from malnutrition. And remember, the live mussels. They are indispensable for Vitamin A and that fish came from the ocean. Pellets may fill the guy, but, he is going to take many many months to convert to processed foods and remain healthy. Angel/Butterfly formulas have sponges in them, or at least its supposed to and nori or algae of some kind will help a lot on this fish's health too.