Sick Fish?

[AquaRick]

Hello aquarium hobbyists I been into the hobby for about 1 year and a half and still trying to improve. I currently have an issue going on with one of my Glofish that has like a white round fungus looking bacteria on one of his side but I not 100% sure if its fungus. I moved the fish to a 10-gallon quarantine tank and been treating it for about a month or more so far. I been using API Fungus Cure and API Salt with 1 tablespoon per gallon but see no improvement. The fish is active around the tank swimming and it doesn’t seem like a bother to it. I am looking for help because I lost 2 fish to mouth fungus and 1 for having fungus around his body and tail. Any help will be appreciated I attached a photo, Thank you.

[Cory]

Hard to tell from the photo, but if it is bacteria or fungus, the 1 tablespoon of salt per gallon should fight it off. 

[AquaRick]

Hey Cory thanks for the help but now when I woke up this morning I noticed one of his eye is swollen on the same side where the bacteria or fungus is. Now that I looked at it carefully I believed it from the inside of the fish body not the outside like a bump. Should I increase the amount of salt since the current concentration isn't doing any improvement?

[yannachka]

if the eye is swollen that tends to happen when the fish starts retaining a lot of fluids. if it’s internal then salt wont treat it. id treat with erythromycin personally. 

[AquaRick]

Thanks yannachka, ill treat it with Erythromycin as soon as possible.