Thank you for taking the time to visit this. I have a male betta, and he has been afflicted with what I am fairly certain to be fin rot for the past few months, and nothing that I do will get rid of it.
His tank conditions: 2 gallons, solitary, heated (approximately 75 degrees Fahrenheit), filtered, gravel, fake silk plants. I add a betta water conditioner, and recently have been adding aquarium salt and "good" bacteria (to supplement for all the water changes). I do a 10% water change weekly and 25% monthly when I replace the filter carbon.
I test the water for: nitrate, chlorine, hardness, pH, nitrite, alkalinity, and ammonia. The only thing that is not automatically ideal is the hardness, which I can usually lower to a suitable condition by adding a pH decreasing acid. Medications that I have already tried: bettafix, kanaplex, and tetracycline. I have tried all these multiple times, and am worried of over-medicating him, and believe that it may be antibiotic resistant. I have also tried the controversial betta "surgery" (applying hydrogen peroxide directly to his fins). This helped temporarily. The medications also seemed to help, but once I stop giving it to him, it will return full force within a few days. I am totally at a loss as to how to help him, I am willing to try whatever at this point. It is now progressively worsening, and I am worried it will spread to the rest of him soon. Thank you again