Heating pads?

I got a baby snow corn last week; a terrific eater and generally a personable snake. She is on coconut fiber substrate, a bit less than an inch thick, with a large pine-bark hide. I am presently using a heat lamp with an ordinary 100 watt bulb in it (metal hood style lamp). I am wondering about undertank heating pads; is this an ordinary drugstore heating pad? I was thinking about placing my heating pad under the tank for better heat distribution but the weight of a glass aquarium seems hazardous on top of a heating pad. The tank is a 55 gallon long, if it makes a difference.

I had thought of placing small blocks of some sort, under the edges of the tank to elevate it slightly, so as to get the benefit of undertank heating without the seeming risk associated with putting the tank directly on the pad... is this workable?

One more question: the snake spends 99% of her time under the substrate; will this change? I believe that she's about 8 to 10 weeks old.

well, i can try to help..

I still dont even have a snake and have been here a very short time...

But here goes (and please do correct me if I am wrong)

They sell a special under tank heating pad. I was told NOT to use regular drugstore heating pads because of the risks involved. You can do a search at like petsmart online to see the heating pads, they come in a variety of sizes for all kinds of tanks... and if i recall... you want to measure the temp above the glass and under the substrate if using an under the tank heater???

I also have a 55 gallon long tank, and wanted to get a baby corn.. but was told not to put it into the tank because it would be too big and could intimidate it. And I do believe corns will burrow most of the time if given the substrate to do so...

Again, please correct me if im wrong, i probably shouldnt even be giving advice, but its 3 am and I have nothing else to do