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Hello this is my first betta. Finally got the tank cycled almost two weeks ago and now my fish has a bad case of fin rot. He was doing fine the entire time up until about five days ago. The only new thing that I did was add a betta buddy to the tank to speed up the cycling process. I moved him to a different tank and have been giving melafix but today it seems to have gotten much worse. I am now trying methylene blue. Is there anything more effective than what I am currently giving?