Hello, so I posted earlier about my bettas fins looking shredded, I have come to the conclusion that it is fin rot. I am going to treat with Salt. From petco not table salt. My question is I have a 3 gallon tank, how often should I treat the water?. Do I change the water? Since it's a small tank should I just do a 100% water change and add the salt. From what I read online it said to do a complete eater change every day for 7-10 days with the salt. Is that really ok for my betta? There is about 2.5 gallons of water in his tank. Please help I don't want to loose him my son would be so sad.