OK, I think you misunderstood me. I wasn't saying that FW snails can live in SW or anything like that, I was just saying that IME they can live through low salities for disease treatment as well as FW fish. my RH lived through a fungus treatment. and it's not the same with land snails... it's completely different. I stand by what I said before--- the land snails die from dehydration because the salt messes up their body chemistry. I have kept brigs in FW tanks full of plants, and no harm came to the plants until I stopped feeding them once, and then as soon as i fed them they stopped.