Kieth, my Betta, has been in my 5G heavily planted Aquascaped tank (4.3 Gallons Actual) for about six months with around 60 RCS. Around 3 months ago he 'scuffed' his head, leaving a small abrasion. Up until a month ago it was nearly invisible and I assumed it was healing. A few weeks ago he developed a fuzz that is not going away now on the same spot. His behavior is normal, but I would like some advice on medication and treatment to rid him of this now ongoing problem. It's now a small fuzzy patch behind his left eye. Picture included. I feel the location of it, located near his eye, is a strong point of concern. Help?