I've read Dr. Ron Shimek's(?) article in TFH about "good and bad" snails for algae control. He considers Conchs as one of the best (the only issue is their big size). Even Fighting Conch is too big to be able to claim up rocks. It was said that there is an appropriate Conch out there, which grows to only about 1 inch. Pacific Spotted Conch (Strombus maculatus). Can't find it anywhere! Any ideas as to where to get it?