My male betta has very severe fin rot and he is currently in a 1.5 gallon QT tank. I am using bottled water with minerals added and 1tsp per gallon of salt with 100% daily water changes to treat him.
This is his 2nd day of treatment and when I looked at him today, I noticed a darkish patch on his body by the base of his tail. It looked like the scales might be gone or it could be a sore, but the light is bad so I can't see it very clearly. His fins still have about a cm or more left, but do you think this could be body rot? If not, what do you think it might be?
Should I start using meds instead of salt? If so, what meds could I use? I have Triple Sulfa at home, but I could go get whatever he needs.