Hygger ETL Certified Aquarium Heater for Coral, Saltwater, and Freshwater Tanks

SAFETY CERTIFICATE: Hygger provides the most effective guarantee for your fish tank with their ETL Certified Fish Tank Heater. The heater features a Thickened Quartz Protective Glass, Bottom Protective Cover, Stable Suction Cup, Double Seal, Precision Welding, and ensures No Leakage of Insulation.

QUALITY GUARANTEE: Hygger's submersible aquarium heater is made with a 2mm thick glass tube, ensuring even heat conduction, anti-collision, explosion-proof, and corrosion-resistant properties. It is dual-purpose, suitable for both betta freshwater and saltwater tanks. The high-efficiency heating wires have a large area and are tightly arranged to increase the heating area and transfer heat evenly.

TEMP SETTING GUIDELINE: To adjust the temperature, simply rotate the heater left and right. The temperature range of the aquarium fish tank water heater is 68°F~92°F. The temperature scale setting guide bar and working indicator light provide a more intuitive understanding of the heater's status.

WORKING PRINCIPLE: The Hygger aquarium thermostat heater stops when the surrounding water temperature reaches the set temperature, and starts to work when the surrounding water temperature is low. This cycle continues to achieve temperature equilibrium, making it more efficient than traditional heaters that are constantly heated.

LED THREE-DIGIT DISPLAY THERMOMETER: Hygger has selected a high-precision temperature sensor that can display the temperature difference range to ±0.1°F. This ensures that even small changes in water temperature can be detected. The sensing range of the thermometer is from 0°C~50°C/32°F~122°F, meeting the diverse needs for water temperature monitoring.

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