Is this fin rot or tail biting?

[Leopardfire]

I could get a container and age my water. I'll try to do that but I don't know if my dad will let me. He does't really like the fish. The salt would probably have worked if it wasn't for the 1ppm of ammonia that was constantly in the water. I may age some water and then try the salt again. Do you think that is better than adding a second dose of triple sulfa? I just can't tell if my betta is better or not.

[Sakura8]

I'd have to see a pic of your guy and his fins but if he's not acting sick (lively, eating), then we may not need a second course of triple sulfa or salt. API Stress Coat might be enough to finish the job.