I just went our local Reefstock and one of the speakers talked about how to keep "expert only" fish and one of them was purple anthias. Said they weren't that bad after you go them eating and talked showed some sort of bottle contraption that was kindof like a constant feeder after he got them onto prepared food. I am sure you have it all under control, but let me know if you want me to try to find the write up or instructions on how to build the feeder. The speaker (can't remember his name now) worked at some public aquarium and specifically with purple queens.