Sick Sailfin

[TangsRLife]

So my fish are in QT for ick. My copper never got above .25 (chelated) My copper product sucks so I'm flushing it out and putting new stuff in Tuesday. But this morning my sailfin tang looked very unhealthy. He is very pale, trying to stay swimming but at a 45 degree angle and in very worried. My other tangs in the QT and other fish are all fine. Can anyone help?

 

[tj w]

Looks to me like he's needing more oxygen on the pic he's at the surface. U may need to get more surface agitation for oxygen exchange.

 

[TangsRLife]

He was just at the surface for a second. He is kinda just swimming wherever no specific spot. All my other fish are completely fine and I have a lot of surface breakage occurring