I wouldn't have gone the chemical route myself, but to each his own. I never heard the potato wedge idea either and will have to try that sometime. My snails aren't out of control yet, but it would be good to know I can keep them from getting out of control. I know loaches and a few other fish are good for eating snails, but what about crayfish? I would imagine they would eat snails, too. Someone else is gonna have to help me on this one, but I believe there is a snail (assassin snail?) that eats other snails, too.