bettas fins not healing??

[AquariumFreek]

Hello.

I recently noticed my betta had fin rot...so of course I went to my local fish store and got some Bettafix. after about a week of giving it to him, I noticed his fins were not healing...so I kept giving to him for about 3 more days and still nothing is happening? Am I doing something wrong?

 

[Delapool]

How is your fish?


Bettafix ime is for light infections. Or did you get the water tested as well just in case.