After an episode of Brook, I have decided to start QTing my fish. I was watching the BRS 80/20 videos, and reading this site and wondering if water changes during a copper QT treatment need to be full water changes, or if I can do partial? Reason being is I don’t have a large enough bucket to mix full 10 gallons with copper for each change. I am using a 10G QT tank and have Hannah checker and copper power.