50 watt - 5 -14 gallons

100 watt - 14-26 gallons

150 watt- 23-40 gallons

Fully submersible heater you can position anywhere in your aquarium. Automatic shut-off in case heater runs out of the aquarium water. Highly accurate due to the use of precise micro switch technology. Shatterproof under normal aquarium situations. For use in freshwater and marine aquariums.