Betta split His tail

I came home the other day ad found my betta had wedged himself under some of the glass pebbles I was using to decorate the bottom of his tank. I got him out and other than dropping his color for a couple hours and a split tail he's okay. I think the split tail is because he likes to flare at his reflection. I took out the pebbles that I had in there and I'm waiting for gravel and a tank mural to arrive in the mail. My main question is this. Titus is still a baby and I wanted to know if there was anything extra I should do to help his tail heal. I put in a picture to show how bad the split is. Oh and I don't have any aquasalts just a bettasafe slimecoat.

Update:

I got Titus some new gravel that he cant get underneath and a mural for his tank so he is much happier other than flaring at everything because of the new surroundings. I've been doing about 1/3 water changes in his gallon tank every other day and moved him closer to the heater so his water stays nice and way and I'm starting to see growth where his tail is starting to fuse back together!