Please Help!

[GuppyGirl20]

I just back from a four day trip. My betta wasn't fed that whole time because I know it doesn't affect bettas to go a few days without food. I had my roommate turn the tank light on and off while I was gone. I was looking in the tank and I saw that his fins are a little ripped! All the levels are fun (posting pics in a moment). I did not see this before my trip so it must be a recent thing (I will admit that lately I haven't been gazing into my tank like I use to but I know I would have noticed his fins if I noticed from just looking in today). I keep at least half of an IAL in my tank or a whole one of the leaf is small. Any ideas??? (Pics below)



I know the PH is kind of high but I also don't know how reliable it is because I broke one of the things and I had to use sink water to was it out to test ph and I don't know the tap ph is but here it is anyway...






I apologize for the photos not being on the right side. I am on my phone and for some reason when I upload photos from my phone they rotate.
My most recent pics are from September 12th and as you can see his fins are fine.

 

[attibones]

It looks like something bit him. Does your guy have any tankmates? Are his fins long enough that he can bite his own fins?

 

[GuppyGirl20]

His only mate is a snail and from the length of his fines in the pictures from the beginning of the month I wouldn't think he could bite them hisself.

 

[betta fish]

It does look like fin nipping and with no other fish in the tank it must have been him 

perhaps he got a little hungry and fancied a snack! it is surprising how tight a circle they can form their body into if they want, his tail should heal just fine in clean water so try not to worry, hopefully it won't turn into a habit, he may have just missed you and became a little stressed.

 

[GuppyGirl20]

(hopefully this isn't a jinx but) His tail is healing nicely.