I have had bad luck with bettas in the past so I am being extra cautious with this guy. He shows no signs of infection, fin rot, or stress so I am going to wait on using the salt. He is very active and behaving normal. He actually just built a new bubble nest!
I am feeding him every other day because he became bloated when I first got him and was feeding him two pellets twice a day. I plan on slowly raising his feedings back so that his stomach adjusts slowly and does not make him bloat. This week he is up to two pellets once a day. I've tried to feed him blood worms frozen and freeze dried and he won't eat them and just flares at them.
As for the tanks temperature I am slowly moving it up as well by one degree every other day. When I do water changes I also make sure that the new water is the same temperature as the water in the tank.
This all might seem a little crazy but I don't want to take any chances. I've lost enough bettas!