I have ich in my reef tank. My fish seem healthy and fine but the white spots seem to be getting a little worse. My plan right now is to take all the fish out of my tank and put them into a QT tank with a lower salinity than usual- about (1.020) and treat them with copper. I have a copper banded butterfly, sailfin tang, hippo tang, powder brown, a scopas tang, and a yellow tang. I have an SPS only reef tank. Should I raise my display tank to 81° and leave the tank fallow for 72 days without fish? I’ve seen to leave the tank fallow for 5 days without fish to 72 days. Any other ideas on what I should do? Should I go through with my plan or do something else?