I got similar problem with my tomato clown which really like to "nest" in my bubble coral until I put in a bubble tip anemone. The clown moved his nest to the new anemone within half an hour. :P
I got one nudibranch from my LFS (actually 2 but one die in a day) and put it in my sump tank (algae filter). That tiny creature really did the job and growth from 1/2" to 1" in 2 week. Will try to get some picture out with my DC.