He's pink

I seen him at petco like a month ago and bypassed him because he has what looks ike an odd skin or fungus like growth on the top fin. It was growing around a hole that was there. I'm positive this is the same fish because that odd growth is in the right spot and he is the right pinkish color.
He was doing the rapid mouth/gill movement thing when I brought him home but that has since stopped. I'm guessing it was from the rather high ammonia level in his cup. It was about a 4.0.
He likes to stare at the wall...
And here are my 2 clown plecos. I have had them for about a month now. I NEVER see them. I had to do a 100% water change since the siphon wont work as the tank is on the floor -and stuck them in a betta cup. Then I took the pic
Miroku and Mioga