White film on angel?
Water is fine, well fed. He has gotten this site film on his head twice now. At first I thought it was stress and slime coat irritation from picking with the acara in the same tank. I was about to move him to my 55 but then backed off because I wasn't sure what it could be and didn't want to introduce anything to that tank. Last time it went away on its own in a few days with clean water, good food and for measure a tiny bit of melafix.