I also dont know if i want to risk another dwarf angel picking at corals.
Interesting info in this month's RKM Tank of the Month.
We keep several species of “questionable selections” in our display. We find that many fish and inverts labeled “non-reef-safe” can be effectively kept by simply paying attention to their needs and behaviors and managing accordingly. Many hobbyists feel that coral-nippers are unwelcome in the SPS display. On the contrary, we find that healthy, thriving SPS can easily tolerate the occasional Angelfish plucking, and that actually promotes vigorous SPS growth. Another important aspect of long-term SPS health is the cultivation of commensal crabs. We find that even some of the “big and hairy” crabs often shunned by some can be friends of large coral colonies, by keeping detritus and pests out, and stimulating the coral with their frequent grooming and other activities.