I am contemplating picking up a gold flake angelfish to add to my mixed reef aquarium. Supposedly, this one of the safer reef fish. The current owner is moving the fish because it's nipping on the open brains and scolys. My tank has acans and zoas which I am concern about. His fish so far has not messed with the acans or zoas in his tank. I would hate to come home one day and see the fish wipe out my expensive palys such as captain america, nightmares, and everlasting gobstoppers. Do I take a chance and hope for the best? What are others' experience?