I've got a glass tank with screen lid, left side is cool side with a water dish, right side has a 100w lamp on top set on low dim and a UTH on the bottom part (making a sandwich). This is a 15 gallon tank.
Am I peeling the mat back under the tank and putting the probe in it or am I putting the probe inside of the tank on top of the glass covering the UTH from inside the tank. I'd prefer to do it outside if that is viable otherwise I might have trouble closing my lid properly