I had two, then one of them made sure I only had one, (he was bullied by the other one into staying in the rocks and stopped eating) and then my Flame Hawkfish made sure I had none. Too bad since I like the constant movement in the top half of the tank.
The Hawkfish took the last one out during feeding time. Don't think it was on purpose, but they both were going for the same chunk of food and there was a collision and brief fight. Next thing I know, the chromis was hiding in the rocks. This was highly unusual since it is a huge eater and only goes in the rocks at night. He finally showed himself about 15 mins later and he was missing one if his eyes. Ended up taking him out of the tank and euthanizing him before he got infected or sick.
Probably not going replace it since I felt I had to feed the tank more often with him in there. I prefer every other day feeding. It's what I have always had success with in keeping phosphates and nitrates in check.