I posted on here before a put my angelfish. He is progressively getting worse and I don’t believe he’s going to make it. He’s in a hospital tank with daily water changes and I am using erythromycin daily in his tank. I had a gourami that died recently and I’m not sure if this is the same problem. With the gourami he had a growth on the upper side of his body almost like a tumor, it got so big I believe it became an open sore before he died. This is the first day that my angelfish isn’t wanting to eat. I just need help identifying what this is in case is spreads to my other fish and if I need to treat ASAP! Pictures show slow progression through the past two weeks!