Also remember, Jorge, QT is not just a place to discover and treat an illness. It's also a sanctuary to give a newly arrived fish a place to 'rest', develop a feeding regimen, and build up it's strength and fatty reserves enough to compete in an admittedly smallish tank. IMO, this is especially important for Copperbands, who are initially a bit timid and weak to begin with. Not only would just tossing them into your DT stress them into not eating anything including Aiptasia, it could cause the very ick outbreak you're so concerned about. Especially buying online; think about what that fish had to go through to just get to you. At this point 'give it a rest' should take on a much more important meaning. QT, brother.