I've have one. It's in with goniopora, leathers and anemones and live rock now. I have had this fish for several years along with several other pigmy angel fish.
I did have a problem in my 600 about a year ago. I had to remove a bunch of pigmy angles after I added a African flameback who went sps hog wild. Seems like the rest copied the behavior. I saved my bicolor and flame and put them in live rock time out for months. Just moved them back with corals listed above in my 93.