Alright, so I'm going to place the probe for the thermostat on the heat pad. Since the Ambient Weather control unit can have up to 8 channels, I got another wireless sensor with a probe:



Now I can put this probe in the substrate for surface temp, and the other 2 will have one on each side of the tank for ambient temp and humidity. And all will be able to be viewed wirelessly from the control panel, which I could put anywhere in my house