I have had one in just about every tank I have ever owned. And have never had a problem until yesterday when I came home. I started to do a water change on my 40 gallon when I noticed my tyree ponape birdsnest wasn’t looking very well. I had changed over to LED in this tank two weeks ago but everything had been doing well under the new lighting. Thinking maybe I needed to move it when I noticed the cleaner shrimp I had just added a week ago crawl up on to the birdsnest and started picking away at it. I don’t know if he was eating the polyps, but definitely bothering the heck out of it. And of course I had to dismantle the tank to get him out where he now resides in my sump of my 300. I guess I will add this guy to the list of not so reef safe with the purple tang I sold to someone who ate $200 worth of coral out of his tank before they could get him out.