Originally Posted by Gregg Madden
If you have your monitors set up properly with a good basking area in a proper caging unit, you will not need to heat up the substrate from the bottom with a UTH or heat mat to get proper ambient air temps...
And like allergenic said, you want the ground to be cool... This is how they thermoregulate... They need many different gradients to regulate their body temperature throughout the day...
What is your cage set-up???
I run heat pads on my ackie setup because if I don't, in the winter my foot deep substrate will reach temps in the 50's regardless that the ambient is in the 80's-90's. Heat generated by lights or overhead sources only force heat downward about 6 inches into moist soil. Since ideal temps for most lizards is no lower than 70's....I would say that giving them such cold substrate is a bad idea....and yes they seek it out if given a chance.
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