Ok so basically I should secure the probe to the inside glass just above the UTH. Then set the thermostat at 93 degrees. So the inside of the tank will never really be 93 degrees, I mean that at the top of the substrate will never hit 93... because it heats up the substate? I am so confused. What should the temp at the top of the substrate be? I am also using a heat lamp and have had to enclose the top of the tank to keep temps up. I am just trying to get this thing right.

Thanks for the help.