i got some live rock a couple months ago and got infested with those parasitic white snails that attach on the bottom of and near the opening to my larger snails like turbos and astreas. there's usually only a few per snail but there's qutie a few(like7) on a couple of my snails. i haven't been too worried but now i want to get clams and know that these parasites will slowly kill them if left unchecked. i haven't got much info from the web about getting rid of them accept to manually pull them off. what other ways can i get rid of them and are there any reefsafe inhabitants that will eat them for me?