love reefcleaners. they have no fish, so you don't need to worry about any fish diseases. AlgaeBarn is another that keeps their snails in fallow systems (according to a rep I spoke to).
you don't *need* hermits. Not only will hermits pick off snails, they will pick at corals as well.
you don't *need* hermits. Not only will hermits pick off snails, they will pick at corals as well.

