From what I have read, it is another one of those generally reef safe, but can be hit or miss depending on your individual specimen. I am very tempted myself to try a butterflyfish too. My first choice is the copperband, I just dont have the
to do it yet. My next choice is the longnose- forcipiger longirostris, which are suposedly reef safe, but I can't find them anywhere. Depending on what other people in this thread say about the Heniochus diphreutes, I may consider that one too.