Hello all, My aquarium seems to be fighting a case of fin rot and I need some advice. I just finished up a 7 day treatment with Melafix and have performed the 25% water change, but my Betta fish does not show any signs of improvement nor any signs of getting worse. I am quite fond of my Betta as he is the longest living betta I have owned (6 months strong!!). My betta is housed in a 10 gallon, heated and filtered aquarium (I am currently running 2 filters on this tank). The rest of the tank info is as follows: Temp: 80 degrees pH: 7.4 (high range) Ammonia: 0 Nitrite: 0 Nitrate: 10-20 range as of today (I've been having issues with this!) Water change routine: 25-50% once a week Cycled: Yes or at least it was Tank mates: 3 cory catfish and 1 female guppy I have been keeping a close eye on my water parameters and have been having issues with my nitrate levels. Earlier this week they were testing closer to 40 ppm. I have been doing 15-25% water changes daily to get the levels back under control as well as using Prime to dechlorinate my water. I have also been using stress coat as well to help in the healing process. What I would like to know from you is whether or not you think I should do another round of treatment with Melafix or try treating with something else? I will gladly take any suggestions you have! Also I have been treating him in the main tank as my guppy has also had a piece of her fin missing as well and I do not have a hospital tank. Thank you in advance!!