Thanks again Big-G thats why i planned to treat the main tank again once the puffer is removed and add a cleaner shrimp. The tank cant handle any more additions due to everyones large size already. I plan to put the puffer right into a 300 after treatment, how ever long that may be. Hes already borderline to large for the 120. Any brands of meds/chems youve used and suggest for the main tank? I'm ok with eliminitaing all my live rock again if i have too. I know copper can be hard to get out. I have an l.e.d. lighting system on the tank so i'd like to continue to grow coral once the ich is removed.