I have had success weening Chaetodons, Centropyge's, Poma/Holacanthus, etc. from feeding upon corals when stocking levels are slightly raised, which keeps animals always on the offensive or defensive, and feeding a bit more often (not necessarily feeding more, just more often); although, animals I am worried about I'll usually quarantine over a 2 month period so all they "want" is prepared foods. Works for me, good luck
