Last week I bought a few potted plants and they came with pond snails. As I see them I have been picking them out of the tank. Got 11 so far. Anyhow, of course the kids are more amused with the snails than the fish. I have been throwing them in a 1/2 g betta bowl (no betta) and I put a piece of algea wafer in there. Can they live this way or will they die? Doesn't matter to me either way. If they will live this way should I be doing water changes very often and how big do pond snails grow? 