I know it's old but new for me. I have a 125 reef tank for last 6 years. It's mixed reef with fish. I always quarantine new fish but newer actually did hypo or copper treatment. I did not see need for it. Fishes were happy and fat. After 4 weeks I put them in my DT. First time now I see they have ICH <ICK>. So I have to tear up my reef and try to catch them. As I keep reading looks like copper is more effective then hypo. Yes, I know there's many opinions. I don't want to screw up, please help me. I know I have to leave display fishless for 10 weeks. I have 75 gal. tank I will use it for for QT. I have 2 HOB filters with bio wheel. Using copper all that colonized bacteria will die so only water changes can keep low nutritiens, right? Any better idea? Ammo lock? Please let me know. And the most important. I read that Cupramine from Sachem is the best copper. And Salifert test kit. Is that right? I hope it says what level of cupramine should I keep. If you guys agree I will buy this at Drs.fostersmith.com. They have those. Please let me know. Thank you. So depressed... Thanks.