ITs just stupid, if you buy fish in real life and the tank is good and the fish are happy, whats to QT? If I want a tang I would ask the LFS just to hold it for me for a couple of weeks. More fish mortality happens when you put a fish in QT than the DT, if you buy fish online, you should maybe QT? Use rapid fish QT but I plan on only buying corals and inverts online,I'm sure you wear a mask when u interact with your tank ... lol but I meant fish QT