hard to make guarantee in this hobby. the best chance r the cherub, flame and cb. the bi-color, i dont hv experience with it. it also depends on the corals u hv. most of these angels listed above, even if not reef-safe, eat only sps or brain corals. if u r willing to sacrifice a few corals, then its fine to add one. get a real small one to begin with, sicne it hasnt acquired any bad habits yet.