Brad yes exactly, I believe the Ich can live on coral or like you say on a snails shell etc. The only way to keep a tank an not have ich would be to not add water, live rock, corals, fish, inverabrates etc...
That being said, have you given any thought to that thread about water temperature and rapid tissue loss? I'm thinking of trying to aim for 78 degrees for my tank temp on the new tank.
Doug
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