How to tell if fin rot is healing?

So I believe my betta has fish rot, I haven't been able to get any good pictures of it because he keeps moving. It's very minor fin rot and it's only on one of his fins. His activity level has remained the same and he's got his appetite. I've also been doing 50% water changed every other day for a week, yesterday I did a 25% change and added an Indian almond leaf. I believe it's getting better since the parts that were frayed has small translucent webbing in between them, which is very hard to see. His fin was also turning translucent a bit, but it's been like that since I started, that's the part where I'm not sure how to tell if it's getting better or not.
Also before when he swam it was difficult to see his wounds since it flattened against him, but now I can see it when it's flattened against him, but it also could've been like that for a few days.
And since it's difficult to take pictures of him it's hard to tell if he's getting better or worse.
I have not used medicine yet.

Edit: I've actually managed to get a few pictures, I circled what looks like new webbing in red and then I circled the translucent part of his fin in yellow

 

It does indeed look like it's healing, great work!

 

It does indeed look like it's healing, great work!

Awesome! I'm going to change it from 50% water changes every other day to 25% every other day, but I'm glad he's getting better ^_^

 

Also one part of his fin kinda looks worse than it did yesterday? (Yellow circled) But the other parts still have that translucent webbing (red circled).
When should I start using medication? Cause I'm still not sure if he's getting better or worse or if it's half and half
I also feel like it's gotten worse since I first noticed it on the 4th, but I also noticed the translucent webbing "healing" after I started water changes a week ago

 

I wouldn't be freaking out just yet, could you take a picture for us so we might help bit better?

 

I wouldn't be freaking out just yet, could you take a picture for us so we might help bit better?

This is the best one I got so far, but once I get home I'll try to get a good one again

 

I wouldn't be freaking out just yet, could you take a picture for us so we might help bit better?

Here are some I just took, he finally stood still lol

 

Hmm, for me it looks like the new growth is starting to get some normal color, but I'm not an expert in this. If you keep water pristine and see for day or two?

 

Hmm, for me it looks like the new growth is starting to get some normal color, but I'm not an expert in this. If you keep water pristine and see for day or two?

Alright I'll just keep doing what I'm doing then and keep an eye on him, thanks