Snakes don't bask........ The only thing you need with tubs and in general is belly heat. Ambient temps are good, but not necessary, and they certainly don't need basking (they are nocturnal). As long as your have some sort of UTH with a thermostat or rheostat, I'd invest in a temp gun to make sure the hot spot doesn't exceed 93*, and you should be all set. They hold ambient and hot spot temps well. Better than glass tanks that's for sure.