Okay so I quarantined him and treated with maracyn 1 and 2 for a week. Still had the mouth sore. So I treated him at the recommended dose of Melafix. Now he has an extra sore higher up from his mouth. I have no clue what is going on. Quarantine was changed 10 percent everyday and treated with salt. That with the antibiotics should have gotten rid of columnaris so it might be something else. Maybe viral or parasitic?
I found it lying dead today. Super super bummed, probably the best fish I had. It wasn't eating for the last couple of days. There was a open sore on top of its head so maybe this was hole-in-head disease?