Betta Fish: Curled fins?

This is my little guy Holo. I've had him for about almost 3 months now. When I first got him, his fins weren't in the greatest shape. He was missing a side fin like nemo and everything. He was basically white when I got him as well, so we named him Holo because he looked holographic.

His fins have grown ALOT since then in fact they originally kinda grew in almost transparent. He's also changed from mainly white to a pretty pink with some blue.

Now his fins are curling and looking a little torn up around the edges. Is this fin rot or tearing? He's eating normally, swimming normally and greets me at the glass when I come home.

TANK INFO

Parameters: 0ppm Ammonia, 0ppm Nitrites, 5-10 Nitrates, 7.2-7.4~ Ph. Temp is 78.

Food: Once a day with a 1 day fast during the week. He gets frozen bloodworms, betta pellets and bug bites betta blend. He also eats the bug bites bottom feeder formula because he is a fat ass and eats with the Corys if he decided I didn't give him enough.

Tankmates: 3 Albino Corys, 3 Bronze Corys, 1 Orange Seem Spotted Pleco, 2 Mystery Snails, 1 Nerite Snail, a metric TON of ramshorns and probably trumpets and pond snails as well.

Tank is fully planted and cycled. I do water changes once a week about 25%.