No, its not a human heating pad. Its specifically for terarriums, its made by zoo-med. Should I use 1 big undertank heater, or 2 smaller ones? As far as temp. and humidity guages go, I just have 2 non-digital guages. My thermometer is about 1 inch off the bottom of his cage on the warm side, and the humidity gauge is around the middle of his cage a little higher up. Should I use less substrate on his warm side with the under tank heaters so its gets through the substrate better? Also, is a manual heat controller needed for the under tank heaters or can I just plug them in and let them get to the max heat output? Thanks for your response