Another update.
I have been thinking this past day that euthanizing him might be the kinder option.
He looks like he has pretty much given up. He's currently staying in the top back corner of the tank with his face against the glass and doesn't move. He still isn't eating. The fuzz that fell off of him was covering a lot of damage, no photos I take can do it justice, and it has to be extremely painful.
I really don't want to give up on him, but I also don't want to put him through any more.
At this point, I'm going to give this fungus cure a chance to do it's job, but if I don't see a marked improvement in his behavior or overall health, then I believe it would be in his better interest to say goodbye.
I will continue to try to keep as stress free and comfortable as possible for now and
I will continue to keep you guys updated on him.
And once again, thanks for the help. I just wish I would have come here sooner instead of taking the advice of "know it all" facebook keepers first.