Tetra 50w Submersible Aquarium Heater DogToysBrand_Dogit Make sure the ball is

Make sure the ball is closed securely before use and has the proper ventilation slots

Available Sizes: 33 lb

Available Sizes (weights are approx

Treat Size:  Large/Giant (up to 50 lbs)

Tetra 50w Submersible Aquarium Heater DogToysBrand_Dogit Make sure the ball isAll Tetra HT heaters have red green indicator lights to let you know when the heater is heating(red) or on standby(green). The low voltage thermostat maintains water at 78F without any adjustment required. Be sure purchase the correct heater for your tank size. Buying a heater too small for your tank can cause under heating. It is critical to ensure your tank is equipped with a hood or glass canopy to contain the heat inside the aquarium. All Tetra HT