About three months ago, I had a small ich problem in my freshwater tank. One of my black neon tetras was infected, and it also had an inflamed gill. I read that this was one of the symptoms of ich, so I treated it as such. I had the fish isolated in a goldfish bowl, raised the salinity of the water, and medicated the water for the recommended period of time. The fish seems otherwise healthy, but it's right gill is still bright red. The fish doesn't seem to be having any trouble breathing, and I haven't seen any white spots or any other symptoms, but I am weary of reintroducing the fish to the community tank. Does anyone know what this might be, or if it's just scarring or something like that? Thanks.