[pbukow]

Feed them krill, very good food. With the lionfish, try to target feed him with a thawed piece of food and stick on an acrylic stick and dangle it in front of him. A lot of times these guys need to be weened away from the live stuff, just offer the dead stuff more often and live stuff less. Keep him hungry too, a hungry fish is a brave fish and will be more inclinded to taste the dead food.

Freshwater fish have a lot of fats in them that can be unhealthy for marine animals, good idea to use it at first just not the only thing any saltwater fish should eat for its life.