Moved all livestock to hospital tank due to blue tangs having ich. Initially moderately low salinity with chelated copper treatment. Later diluted with PWC
's (daily) to get rid of copper and switch to hyposalinity. Hospital tank currently at 1.010 SG
. I don't monitor any other chemistry because I'm doing PWC
's so often.
Flame angel went into hospital with no symptoms. Developed small white spot on head just above eye which progressed to what you can see in the photos.
Any idea what it is? I don't see any parasites. No reason to believe it was injured in the move either. Currently no other companions in hospital tank.