Ok, this is a weird question I guess... I rescued a sick betta from work, and have been treating him with the bettafix and salt remedy for about a week and a half. He has been getting better (more lively, brighter colors, better appetite). But there is one thing that isn't getting better. He has what I thought was a mouth fungus, but it is black. Everything that I have found on mouth fungus says its either white or grey. Does anyone know what a black growth around the mouth could be? It hasn't affected his eating yet, but it is very noticable. Let me know what you guys think!
Thanks!
Erin