tub air temp

so i got my supplies for my ball python i wanted a tub but my house at night gets to 50 degrees how do you get your tub air warm with just a heat pad ?

Oh wow that is a cold house! You will definitely need something other than a heat mat to keep it warm enough at night. If you can put a space heater in the room, I would do that. If not, a heat lamp or heat emitter might be the only way to keep the temps high enough. I would definitely get a thermostat for the heat lamp to help make up for the temp swings.