Hello all. So recently I noticed my Betta's fins weren't looking so snazzy. It began when I moved him from the 2.5 to the 10 gallon. He's active and swims a lot and eating just fine, but I'm still worried. Once I noticed it was fin rot, I moved him back over to his previous 2.5 gallon which I kept cycled as an emergency tank. I'm treating the water with aquarium salt and daily water changes, just needed some advice on how to proceed. I typically do 20-25% water changes once a week and test the water before and after I do it to make sure that the pH, Nitrates, Nitrites and Ammonia levels are in check and nothing is off, so any advice or suggestions would be greatly appreciated.