I am in the process of quarantining a desjardinnia tang and two fire fish. They have been in the qt for about 2 weeks (total recall anyone??) and the tang had a white spot on this top fin that looked like loose skin. It has she'd this mark and is healthy now. This was about 5 days ago we notice the spot has gone away. Question is: Do you copper every fish just to make sure or should a 4 week qt. symptom fee be enough? I don't want to introduce ich or brook into the display from a carrier but not a symptom shower. All three fish look fine at two weeks.