Ok had a question that's been a bit difficult in clarifying, I know the temps in a Pacman's tank during daylight cycle is best kept at roughly 78-82 degree's, BUT is this measurement best taken from the heat in the soil the Frog burrows into? or the ambient temps throughout the whole of the Tank?

In shorter and more concise wording.

Should I put the temp gauge thermometer probe in the dirt? or let it hang somewhere around the middle of the tank?