I've been looking in my tank recently and have noticed about 10 little snails. The biggest one is about 3/18 of an inch long. I have read about other people thinking that they have baby snails, but they are actually hitchhikers. I think that these are different because the snails are starting to develop lines on their shells, like my adult mexican turbos. I have a few of these in the tank, so could these snails be baby turbos?