This is my first time posting, but I'm hoping that you'll still be willing to help me. I have a Black Skirted Tetra(3") that has developed one swollen gill. It almost looks like it's cheek is trying to pop off. You can see directly into it as it's so puffy, and sticking out so far from his face. It's very red(the color of blood), and the grey scales seem to be pealing, in almost a wavy line, where they would have otherwise closed smoothly to the rest of his cheek. His mouth is constantly working, like he's gasping for breath but he seems to have no trouble breathing, it's just constant mouthwork. It's steadily gotten worse for about 4 days. So far I've treated for ich(heard about swollen gills being a symptom, and originally that's all it was), and also for fungus(there was a recent outbreak of that about a week ago, and I thought it might be coming back), and currently I've just been adding antibacterial/healing tonics in hope that it'll help it heal. He's my largest Black Tetra, and also the first one I bought, so I'm hoping its not terminal. Can anyone shed any light here?