I'm preparing to switch to a new set up as soon as everything arrives and I was curious about the placement of my temp probe. Currently my probe is inside the tank under the substrate. So its uth-glass-temp probe-substrate. I have the thermostat set at 101 which leaves the top of the substrate at 87-91 according to my IR thermometer. Is there any reason that I need to move my probe to out side the tank or will it be ok under the substrate in the new tank?