hygger Variable Frequency Aquarium Heater

1 customer review
5.00 out of 5 based on 1 customer rating

Quartz aquarium water heater auto abnormal alarm for 20-100 gallon freshwater saltwater tank.


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Package includes:
1 x Double Quartz Heater with LED Digital Controller
4 x Suction Cup
1 x User Manual


Auto Power Off & Abnormal Alarm

hygger aquarium water heater has an intelligent dual temperature probe and memory function. It will automatically stop heating and emit a warning signal when the heating rod is out of the water or over temperature, and resume work when the heater rod is completely immersed in water or cools down.

Variable Frequency Energy Saving

Its intelligent variable frequency design can reduce power consumption. High-power rapid heating, low-power to maintain water temperature. When the water temperature is 1°F lower than the desired temperature, it will automatically enter 50% power heating, saving electricity and energy.

Dual Temp Sensing Probe

An intelligent dual temp sensing probe can accurately detect aquarium temp, when a probe fails, the heater will still work normally to avoid accidents.

Out of Water & Overheating Protection

When the heating rod is out of water, it will automatically stop heating and emit a warning signal to avoid burning the heater rod. The LED display flashes ‘E01’.
When the aquarium heating rod is over-temperature, it will automatically stop heating and emit a warning signal to prevent fish from boiling. The LED display flashes ‘E02’.


Quartz insulator, non-leakage and non-conductive, the heater is safe for fish. Quartz thickened glass tube is sealed in one piece, anti-corrosion. This aquarium heater is perfect for a fish tank of up to 100 gallons.

Wide Compatibility

hygger Variable Frequency Aquarium Heater 200W is suitable for 20-gallon-40-gallon tanks. And there are 300-watt heaters and 500-watt aquarium heaters for fish tanks from 30 to 100 gallons, which can be suitable for a large aquarium.

Precise Temperature Control

Aquarium water temperature can be precisely adjusted from 54℉ to 90℉, press the “SET” button one time can change 1℉. Rotating the “SET” button one time can change 0.5℉. Accurate temperature measurement and high-definition LED digital display (display accurately to 0.1℉) make the temperature difference exactly for fish’s health.

Rapid Heating & Safer

The double heating rods are made of explosion-proof quartz glass, which is anti-corrosion, non-leakage, and non-conductive, making the water heating faster, more stable, and safer. 4 suction cups are firmly installed, and the ABS protective shell ensures the safety of aquatic pets.

Easy to Operate

The external adjustable heater controller is easy to set and operate, connect to the socket, and use directly. The clear LED display is easy to read and set. With the memory function, if power is shut off, the aquarium heater will keep the temperature settings when it powers on again.

Directions for Use

Please note that unplug the aquarium water heater and wait for 15 min before changing the water or removing the heater. Make sure the heating rod is completely submerged in water, and there is enough water flow and water circulation in the fish tank when using the adjustable aquarium heater.

Note: The aquarium heater should not be exposed above the water’s surface or in contact with sand or stone, which may cause danger.

Use Tips

You should install a quartz aquarium heater vertically or obliquely on the side of the aquarium tank, close to the water flow or circulation, and make sure the heater rod is completely submerged in the water.


Hygger Variable Frequency Aquarium Heater Specification

Additional information


200W 20-40 Gallon, 300W 30-60 Gallon, 500W 50-100 Gallon

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1 review for hygger Variable Frequency Aquarium Heater

  1. Jeremy Levin

    Best aquarium heater I have owned. Keeps temperature consistent. I have them on all my aquariums.

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