10-16-2009, 02:31 AM
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Does the tank contain any invertebrates? and is it run with live rock for filtration?
Ich in the salt water aquarium can be a bugger!
If you dont have any invertebrates and dont plan on adding them in the future, you could treat in the tank, but the live rock if you have any will not be safe for use in an aquarium with inverts.
If you do have inverts then you will need to set up a QT tank with a small amount of live rock, you will have to treat with a form of copper to kill the Ich. The fish will have to remain in the QT tank for 8 weeks, whilst the main tank runs fallow for that period, so the Ich starves