I've got a fish and 75g reef tank. Tang, gobies, rabbitfish, and clowns. Turbos, and a variety of hermits (maybe 15 or so) and cleaner shrimp. Sand sifting and brittle stars.
suggested I add a couple of the emerald mythrax crabs to do the clean up work when small fish my disappear/die under rock. Or just good cleaning around the bottom for other stuff. I've also heard from some that they are destructive and can knock small coral over. I don't like to glue.
Any advice on if I should include'm and how many? I'm thinking of small ones that can grow with the tank and not come in too destructive yet.