I noticed this on the skin of my juvenile emperor angel two days ago and from my quick reading online it seems to be black ich. It looks like a coat of black slime/fungus. My local lfs
recommended a herbal Parazoryne treatment and I have been doing it for two days so far. It's a ten day treatment but I had hoped it would show signs of improvement by day 3. The emperor angel does not seem distressed in the least. He is swimming as normal, eating plenty and grazing on the live rock in the tank regularly. Here's a few pics (sorry for the terrible camera). Is it really black ich or something else?