Hi, I have been treated ich for three weeks now but with little success.. here is what happen, I was putting two of my five sick fish to QT treat with "coppersafe" for experiment, the result was surprisingly good no visiable parasites only gill still infected in first ten days then I add all my fishes to QT, a week passed some of my fish got ich in QT even treat it with copper, I keep copper level in 0.25mg/L ... do i have raising copper level?? any suggesting !! thanks in davance!!