It is highly recommended to use this heating pad with a thermostat and set the temperature probe closest to the heating pad. For safety, it is better to put something thin in the middle so that the temperature is not lost and the animals are not injured. And winter and cold glass tanks can lead to heat consumption, you can set the controller to MAX position or put some thin heat insulation films on the bottom of the pad. No need to worry about your tank messing up by the stick. Noticed : Do not cover the heating pad with non-heat-conductive objects such as wood chips, coconut earth and duvet towels. SUITABLE FOR MOST REPTILE AND INSECT FARM - Suitable for turtles, snakes, lizards, geckos, hermit crabs, tortoises, spiders, breeding insects and other amphibians that require abdominal heat. Note: The data is all manual measurement, please allow 1 - 3cm error, due to the difference in light and display, there will be a certain color difference , depending on the physical object received.