The only thing I will add is that copper removal depends mostly on the type of copper used. If they used Cupramine then it is far easier to remove then some of the other stuff. I started to go with copper in a QT with some live rock and sand that I took from the DT, but then decided to go the Tank Transfer Method route instead. I had only put 1/4 of the dose in for a week or so, but then added one of those copper removal pads. I had a PAR38 over the tank for light and the corals started growing in the QT that just had copper, so I would say that the pad worked very well.