The Tetra HT-55 (200 W) is a submersible glass heater for aquariums ranging from 40 to 55 gallons in size. This heat and shock-resistant unit features an electronic thermostat that automatically maintains the temperature at 78°F (±2°), and also prevents overheating to extend heater life. It can be positioned anywhere in your aquarium using the convenient suction cup mount.
The easy-to-conceal HT-55 is equipped with a handy LED indicator light. It glows red to show you when your aquarium is actively being heated, and glows green when the set temperature has been reached. Includes a 2-year limited manufacturer's warranty.