When I first got my true percula I had a difficult time getting him to start eating. I have read that wild true perculas can be tough to get to initially accept food in an aquarium. I tried mysis with garlic extreme and many other combinations with no luck. Luckily a friend of mine lent me some of his cyclop-eeze wafer style food and said if the clown won't eat that, it won't eat at all. Sure enough the clown went for it and now I have him eating mysis and other foods with no problem but the cyclop-eeze remains his favorite.
http://www.marinedepot.com/aquarium_fish_food_argent_cyclop-eeze.asp?CartId=
http://www.marinedepot.com/aquarium_fish_food_argent_cyclop-eeze.asp?CartId=