To add to ziggy's list... trochus snails. Those are the "big hitters" in my tank. Well... beside the two turbos that are starting to get a little larger than I'd like. Good thing I've got everything glued down.
Other thing you could do if you're not doing it already is just before water change, blast all your rock with a turkey baster. Or if you're pumping the PWC
water back into the tank with a powerhead, direct the stream of incoming water at the rocks. Blowing off all the junk on your rocks might help in keeping things less fuzzy too.