I recently bought a Sailfin Tang; soon after I added it to my tank it showed obvious signs of infections. I decided to QT all of my fish, the rest of the fish are all fine but the tang did not recuperate. The Tang is currently propt up on a rock; it definitely will not survive. So my question (a most likely stupid question) is do the rest of you flush the fish when it is still alive but obviously dying, or do you wait until the fish is completely dead? Sorry for such a stupid question, but this is the first fish I have lost. Thanks alot.