So I have a small CUC in my 29. 2-3 Scarlett crabs, 2-3 Blue Leg, 10 Astrea snails, 5 Cerith snails, 2 Peppermint Shrimp, and 1 Cleaner Shrimp (if that counts). I HATE the crabs, all they do is jump all over all the corals and make them close up, the shrimp are a nightmare when feeding. I have found that snails really don't last that long, what would you have?