I went with a snail only CUC cause that way I don't have to worry about them killing snails.
I have Cerith, Vibex, and Netrites. The cerith and vibex stir the sand and come out at night to clean and when food is introduced into the tank. The netrites love diatoms, cyano, algal detritus, and film algae. I had a rock that had some diatoms on it and they got on it and sat there for 2 days now it is whiteish again.