I have a 120 gal tank that due to my lack of patients I had an ich outbreak. I moved all the fish to a QT and treated with copper for three days. Since it was time to do a major cleaning of my tank, I took everything out and cleaned everything. I have set the tank back up and now I'm going through my 8 week waiting period for all the ich to die in the DT. Is ther anything I need to do while the fish are in QT waiting out the storm. Should I keep a low level of copper in the tank just to be sure all the ich is gone or should I just keep an eye out for the white spots and treat as needed?