The Aquarium Systems Visi-Therm Submersible Heater is completely waterproof and submersible, and the best mix of accuracy and price on the market. It features a visually adjustable temperature regulator and an easy to adjust dial for maximum control and ease of use. An extended-life power lamp indicates on and off cycles of the heater, so you can tell at a glance if the heater is working. The non-ceramic element supports make this heater unusually light which prevents suction cups from pulling loose. Designed for use in both freshwater and saltwater aquariums. Extremely accurate magnetic switch for precise temperature control. Mounting brackets and 2 suction cups included.
Size: 7 1/2" long, 50 Watts (For aquariums between 5 - 15 gallons)