Can anyone give me the best advice for treating Betta fin rot? Recently I realize my betta fish is suffering from what looks like fin rot. I realized something was wrong when I saw a piece of his fin on the gravel. I keep him in a 3.5 gallon tank alone. For now I have him in a one gallon bowl for four days now to treat the fin rot. I change about 50% of the water in the bowl daily and dose the replacement water with a small dose of salt to help healing. I also dose the bowl with melafix each day. He seems to be doing ok in the bowl. He swims around normally and eats but when he was in the main tank he would not eat and stayed at the bottom. I have cleaned out the main tank completely with hot water and refilled it and washed the ornaments. Right now it is running with the filter. When I’m ready to transfer him back to the main tank I will add quick start. My question is when should I transfer him back to the main tank? How much longer should I treat him in the bowl before doing so? And after I transfer him should I continue treatment? When will the fins grow back? Sorry for so many questions but I really like this betta and I’m trying hard to save him. I have attached a few pictures. I hope you could see his condition clearly.