My Betta fish Phil is sick. I noticed last week that he wasn't eating, was being lethargic, and looking rather grey. He also had some cottony white stuff around his gills and on one fin.
At the recommendation of a man at the store where I originally bought him, I started him on Betta Revive, which is essentially Methylene Blue.
It's worked rather well so far, he's eating again, and much more active, and even has some color.
But the problem is that even though he's better, he still has a patch of white on his gill, which is still a bit swollen (though it's gone down a bit) It's large (takes up most of the side of his face) and indented like a sore. I think it might go away after more treatment, but you're only supposed to use betta-revive for 7 days, and there's only one day left, and that white patch definitely won't have disappeared by then.
Can anyone recommend a product to continue treatment? I don't want the infection (I think it is fungal, but I don't have much experience with this) to start coming back since it's not completely gone.
Alternately, does anyone know if methylene blue is safe to continue using, if there has been notable improvement over the course of the treatment?
I would appreciate any help I can get, this is my first post here!