I was looking in my tank and all of sudden I see a snail. I don't have live plants and I heard that they could transport them to my tank. But I also hear that a store bag could transport them. Currently I have a platy and 3 guppies. I'm also planning to add 6 cory cats and a honey gourami. Is the snail a problem for these fish. Will they be a pest for my tank? I'm not thrilled about having them in the tank, but if they aren't going to be a danger or a nuisance then I guess it'll be alright?