People over exaggerate the QT process. Wether they think its challenging or takes too long. Challenging: Its as simple as filling up the tank with salt water like you do with salt water, adding a heater and a sponge filter. I prefer to keep a brand new sponge filter in the sump of my display tank to colonize beneficial bacteria. In my scenario since I have been QTing large surgeonfish I have been running two decent sized powerheads in the 40B QT I have set up to provide sufficient oxygenation of the water. Time Consuming: The time it will take to start all over once you get a disease into your system will take much longer that QTing a fish. A proper QT is 3-4 IMO depending on the disease the fish may have. If it does not show any signs it should stay in anyhow. I recommend treating with prazipro regardless. Its a very safe medication. Cu in my opinion should be avoided unless completely necessary.