I was looking around to get my Ball a thermostat for the UTH and I noticed some said that you're supposed to stick the probe in the soil, but I've seen people put the probe under the terrarium with the UTH covering it. Does it matter where the probe goes??

Was looking at either of these two:

http://www.amazon.com/dp/B0019IHK9Q/...I3VXJKYIS8PXLG (since I do have a Reptifogger)

http://www.amazon.com/dp/B0047KKOMI/...I3UMKZRDEI7QDM

Suggestions?