RussellTheShihTzu: he had some tearing before but there was only one long split in his back fin. Now there are two more that appeared out of nowhere. Sorry it may be hard to tell from pictures.
Greenapp1es: thanks I may try daily 20% water changes and treatment to see if that helps. Will definitely try turning the light off for now. I have two African dwarf frogs though so I'm not sure how they would react to the salt.
And here's the before picture to compare to if that helps. I hope I'm not overreacting or anything I've just been watching him pretty closely since I've been trying to get him to heal.