I don't have any experience with this. but on
this page on WWM Fenner suggests a Scooter Blenny (Neosynchiropus ocellatus) as potentially helpful. Don't know how well a blenny might get along with your corals, though. I've read that sometimes blennies perch on corals and irritate them. (My tank is FOWLR, more or less.)
Maybe someone else with some experience with scooter blennies will chime in.
ej