I've had my albino corn snake for about a week and half now and I've been researching proper care. A lot of people tell me I need a heating pad, not a heat lamp, because they need belly heat to properly digest their food. My question is, what exactly are heating pads? Do they go inside the tank or underneath it? I know you're not supposed to use heat rocks because they can burn themselves, but I'm not sure if the heating pads go inside the tank or not for that same reason.