Alright, I have been treating the tank and the fish for ich for the past three weeks or so and it has been going well. The fish look good in the hos tank, the main tank seems to be killing off the crap inside. My question is thus: most people seperate fish from tank to kill off all ich parasites in the main. However: I use seawater to do my water changes.. which can possible reintroduce ich to my tank. (I have read ich is present in just about all seawater). Am I spinning my tires leaving the fish in the hos tank or should I continue with it? I figure it'll kill off the major bloom of ich that hit my tank originally and the fish get cleaned up (they look great now) thoughts?