Fungus on Royal Plec

[ianbev]

Can anyone help identify a fix for my Royal Plec.
This appeared and the fish is 100% perfect no change.
The fish is active and eating.
In a large planted Discus tank.

 

[johnbetta397]

if it has fungus there are a few things to try a salt bath dip or a dip in methaine blue or u can treat with acraflyne or machgreen but best done or bacteriacide treatment but best done out of discus tank