ocellaris breathing fast - what cause?

[vaporize]

Just wondering what can cause a clownfish to be breathing fast.

The whole tank of ocellaris had ich before 4 weeks ago and was put into copper+hyposalinity treatment (1.010-14). All the fish are doing fine now and no signs of ich. However one of the ocellaris still breathing a bit too fast comparing to other ocell.

Just wondering if there are anything else that might cause this symptom. It is eating and all that, except it is breath fast when idle and kinda bobbing left and right.

 

[stykthyn]

what is your copper concentration? some fish are more sensitive to it than others.

 

[vaporize]

copper level at 0.3ppm. However all other ocellaris of the same type are breathing normally, only this one exhibit faster breathing pattern.

I am just wondering if any other parasite/disease might cause that. Other than that, it's eating and swimming and sleeping alright for more than a month now. Only when it rest, it breathes fast and kinda bobbing his head left and right.