I have an undertank heater that keeps the substrate(sand which he loves to burrow in) at about 85-90 at the bottom of the sand near the glass.This is on one half of the tank. I was wondering if I should add a basking spot? He doesnt seem to be too cold even though the other side of the tank is only in the high 70s he still wanders over there quite often. Does this sound about right if I use the basking light it will heat up the over all temp probable to the mid 80s.

