Hey everyone, I got another spout of ick in my tank so I am trying to do hypo salinity this time to get it out. I hope that someone can answer a few quick questions for me about it so I don't kill my fish! I just got 2 puffers and guess what they had ick =) I originally took them out in a quarantine tank, treated with copper for 14 days, (ick was gone) and then put them back in my 220. A few days later the ick comes back so i guess its in my tank now. I have other fish in there that are not showing any symptoms of ick and they have been together in the tank for about a week. I lowered the salinity down to 1.016 right now and waiting on getting a refractometer to lower it the rest of the way. Anyway to my questions, I know I have to lower it to 1.009 however upon doing research, would this kill my snails, hermit crabs, and lobster I have in my tank? Another forum said it would and also kill my live rock and sand. Another question is that if I lower the salinity will the ick be completely gone from my fish and anything stuck on my tank? What I really want to know is when I bring the salinity back to where it should be after 45 days, could my fish just get ick again? or will it be gone and they can never get it again cause its not in the tank or in my fish.