Looking for small tang or algae eating fish, crabs, etc

[Engloid]

My frag tank is getting some hair algae. All my tangs are too big to put in the frag setup, or I would put one in for a while. Nonetheless, I'd like to get one that's small. I have a starry blenny in there, but I don't think he does anything at all on hair algae. I'd trade him if anybody had something. As for a tang in a frag tank...When it got bigger, I would either find it a new home, or put it in my display tank.

I would also be interested in crabs (emeralds or whatever), snails, starfish, or other livestock.