No direct experience with that but I would have to assume Wrasses, maybe Springeri Damsels. I think I remember @vetteguy53081 recommending Lunare Wrasse but do you homework, Lunare Wrasses get 10" and require 125 gallon tank when full grown.
/But @sfin52 say's they will go on their own likely so I wouldn't worry about it too much. I'd probably just siphon out some when I see them and they'll likely never be an issue.
