It all depends on your setup. So long as you're sure the snake can't get burned by nestling down close to the glass (which you seem to have covered by having newspaper down) then it's ok to have the probe on top of the substrate. So long as you don't have a really thick layer of aspen, so that the newspaper is having to reach temps of 100+.......you're fine.Originally Posted by Swingline0.0.1