we've been keeping one for close to two months now. our fish spends most of its time in the water column begging if it sees us. IME, it took better to being stick fed than feeding from the water column, altho, once it got the idea, it accepts food from the water column as well. we feed ours using an "invisible" feeding stick, which is a length of 50 lb test monofilament attached to the "business end" of a commercial acrylic feeding stick:
you might also try dimming the tank at first...
being a temperate water fish, we keep ours at 66*-67*F. unfortunately, these fish have a dismal survival rate in captivity. there have been some specimens being collected in Cebu, PI that are found in slightly warmer temps (low 70's) which MAY fare a bit better (our specimen is such a fish). one thing to look out for is bacterial infection, which can progress very rapidly.
can you please give a rundown on temp, tank size, tankmates, etc., and post any pix you may have?
that being said, they are indeed gorgeous: