Who uses quarantine tanks?

[hawk]

Originally Posted by EmilyB

I don't QT. In fact, I bought a fish with full blown ick and threw it into my reef tank, knowing that good food, good water quality, etc. would cure it in a hurry. And it did, because my existing fish were healthy.

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Not trying to be argumentative and glad it worked out for you, but IMO probably not the best idea to expose a healthy tank to a known diseased fish. Skipping qt and dealing with ick is one thing but what would you have done if the fish had flukes or velvet?, neither of which have visible symptoms in the early stages.
The good water, stress free environment argument is often used as a reason not to qt but unfortunately poor conditions can arise in any system at anytime ie. holidays, power outages, equipment failure, work, sickness etc. The key is to keep the disease out of the display in the first place.
There is no reason a properly set-up qt should be a stressful environment nor should it get the blame for a fish death. If a fish dies in qt, there was something wrong with it and better it dies in qt rather than the display. If a healthy fish dies in qt, then there was something wrong with the qt procedure. I agree with Marie, the reason I qt is to protect my display, the many benefits to the new fish are secondary.