I feed mine sinking pellets that most of the other fish don't like too much. I also throw in some dried seaweed for them (I don't have any herbivorous fish). It seems to work.
When I got a hammer coral a few weeks ago, one of the peppermints attacked it, by ripping some of the polyps. I was horrified, but as soon as I threw in some pellets, it stopped.
Obviously, this isn't a good thing long term, as I'll have to feed more to the tank than I'd like. I certainly won't be replacing my peppermints when they die. And yes, I'm sure they're peppermints.
