Betta Fish: Update!!

This little guy (I’ve named him Orbit), for context, was my sister’s fish. He was in terrible condition: starving, pineconing, with severe finrot. Two days ago was when I got him, instantly started treating with Kanaplex, just one scoop for the 5 gal. Yesterday I did a water change and redosed the scoop. Today he’s swimming around and looking super lively. This has allowed me to get a good look at his fins and overall condition. I do need some help knowing if he’s still pineconing, as I did catch it SUPER early. If at all. It’s very hard to tell because of his skinniness. (Last pic is from day 1)