Stat probe on top of or underneath substrate?

[iPHAILZ]

Thermometer probes on top. T-stat probes only under very specific conditions are safe for interior mounting and with out discussing the conditions required to keep them safe I would be unwilling to comment further. PROBES MUST BE SECURE no matter what the set up they simply cannot be easily moved under any circumstances.

I respect your line of thought with possible danger to the snake but like i said earlier with a wooden viv there isn't an option to put the mat/stat outside. Is the recommended method to heat a wooden viv therefore with a cieling or wall mounted ceramic bulb?

As i am having issues maintaining decent ambient temps in the current vivexotic lx24 with a heat mat i am moving over to a different type of viv when it gets delivered tomorrow if you are reading previous posts. My long term plans are however to go back to the vivexotic wooden stack systems so want to get this right.

As you can see i am 100% committed to getting this right so please excuse any ignorance shown so far.