I just got back from my lfs. Spoke to the guy able snails, he told me sometimes when he gets to work he looks in the tanks and some fish are being attacked my snails eaten alive! is this true? he pointed to me the snails that seem to do it and i happen to have one of them and have yet to experience this issue. The snail is in my fry tank for weeks now. He also told me he places another type of snail in the tank and they will kill the other snails that attack the fish. I found this very odd, what do you guys think?