Hygger 800W Submersible Aquarium Heater for 106-211 Gallon Fish Tanks

[Automatic Safety Shut-Off and Fish Protection] If the water level drops too low and exposes the temperature sensor to the air, the hygger aquarium heater will automatically shut off, with the controller flashing an "E1" error code and emitting a beeping alert to prevent overheating.

[Versatile External Controller] The multi-functional external controller features: 1. An easy-to-read digital display that shows both real-time water temperature and the set temperature, available in either Celsius or Fahrenheit. 2. A red indicator light that illuminates when the heater is heating, and a green light when the desired temperature is reached. 3. An audio alert to notify you of any issues. 4. Simple temperature adjustments without the need to get your hands wet.

[Efficient Heating with Dual Heater Tubes] The hygger 800/1000w aquarium heaters are equipped with dual heater tubes, which speed up the heating process. Made of premium, corrosion-resistant, and shatter-proof quartz glass, these heaters are suitable for both freshwater and marine environments. A detachable black safety protective guard is included to protect fish and other livestock from potential burning.

[Temperature Alarm and Automatic Shut-Off] The heaters are designed with an alarm system that automatically shuts off and emits a beeping alert when the water temperature drops below 59°F or rises above 95°F. The system resets when the water temperature returns to the control range between 59°F and 93°F.

[Selecting the Appropriate Heater for Your Tank] The hygger aquarium heaters are available in different wattages to suit various tank sizes: - 300 watts for 40-65 gallon tanks - 500 watts for 66-132 gallon tanks - 800 watts for 106-211 gallon tanks - 1000 watts for 159-317 gallon tanks These heaters are suitable for both freshwater and marine water environments.

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