Getting a good one is the trick, unfortuanately may have to try several times. I finally gave up and put that on my do not buy list along with the
Achilles tang which I have filled enough of. .
I have only had 1 that i've kept for long period of time and that's becuase was in a 320g tank with plenty of live food. I even trained it to eat prepared in quarantine before placing in there but once life food available he quickly became untrained. When downsized from that to a 125g no longer enought live food, wouldn't touch frozen even if it bonked it on the head and perished about 2 months later.