BettaEddie, from my understanding, fin rot is mainly caused by stress, most often from poor water conditions. Mine have the same symptoms as yours, frayed tail and fins. My water parameters are perfect though so I can't figure out the problem other than he came from Walmart and their fish seem to always be sick and diseased. His tail looked great when I brought him home though. The water flow from the filter may have also been a problem but I have cut it down as low as it will go. I had planned to try Maracyn tonight but when I opened the package, it looks like Maracyn isn't what I needed. I actually need Maracyn 2. I may try to find the Jungle FE tomorrow. Petco has it on their website and there is one about 6 miles from where I work. I do know that Melafix hasn't done anything for him in the 10 days I have been using it.