Aqueon Submersible Glass Heater 300 watts

Each unit is fully submersible, shatter resistant and equipped with an electronic thermostat that provides accurate and reliable heating. Additionally, there is an adjustable heat settings ranging from 68° - 88°, an LED which illuminates when actively heating and a built-in auto shut off function that prevents the heater from overheating. The suction cups make horizontal or vertical installation quick and easy. Fully submersible with shatterproof and nearly indestructible construction Electronic thermostat with advance gravity shut off technology Adjustable heat settings, accurate to +/- 1° with LED light that illuminates when heating Can be easily installed both vertically or horizontally using the included suction cups For fresh or saltwater aquariums up to 100 gallons