feeding copper banded butterfly

any one have epericance with theese guys he seemed to eat alittle brin last night and is always grazing looking for glass anenomies , just curious i dont want the little guy to starve, also ainy info on them you have like just do's-donts all that ?

 

Chelmon rostratus (Linnaeus 1758), the Copperband Butterflyfish or Beaked Coralfish. Most die within a week or two of capture from trauma and starvation, dying "mysteriously" in the night. Due to better conditions in the age of reef keeping, some folks are able to salvage specimens, even handfeeding them. From the tropical western Pacific, to six inches overall length.

http://www.wetwebmedia.com/chelmonfaqs.htm