[Rick your just anti Q tank. ] said:
[Not at all if you have the right quarantine tank. But I know the healthiest environment I have in my home is the reef tank. And I know how easily the water in 10 gallon tank can go bad. With two tangs in a 10 gallon, even with a great skimmer set up on it, the water could get bad in a few days. Without some great setup like that, you might have to do a 20% water change daily to keep the ammonia from creeping up. And that alone would add stress to the fish in a already stressfull situation.
I do not see any great percentage on how many fish make it versus ones that do not, putting them into quarantine first. Basically because most quarantine tanks do not have as good an environment as the main tank does. In the right kind of setup, keeping the water quality pristine and the room for two tangs, sure keep them in the quarantine tank.]