hygger ETL Certification Aquarium Heater

Product Features

• 1. ETL Certified heater, thickened quartz glass, double seal, safe for fish tanks.
• 2. 2mm thick glass submersible heater, even heat, durable, for salt/freshwater tanks.
• 3. High-efficiency wires, large area, evenly distribute heat.
• 4. Easy temp adjust, range 68℉-92℉, perfect for aquarium heaters.
• Auto cycles on/off to maintain set temp, not continuously heated.
• 5. 0℃-50℃/32℉-122℉: High-precision(0.1℉) LED thermometer, ideal for temp monitoring.

The hygger submersible aquarium heater, featuring an adjustment knob, is designed for small betta and coral tanks and is compatible with both saltwater and freshwater environments. It is ideally suited for fish tanks ranging from 15 to 80 gallons. This compact heater is ETL certified, ensuring quality, and can be easily concealed within the aquarium.

ETL Certified for Quality and Safety

The hygger 998 Aquarium Heater is ETL certified, offering a double layer of protection and having passed stringent UL certification standards. It includes an internal fuse for safety, which automatically disconnects power if the heater is out of water for more than 3 minutes, preventing damage to the unit.

Note: Even if you re-submerge the heater after this auto-shutoff, the heating indicator will remain on, but the heater will not resume operation until manually reset.

Precise Temperature Control

Allowing you to set the temperature between 68°F and 93°F, this heater maintains a constant and stable water temperature for both freshwater and marine environments, with an accuracy within 2 degrees Fahrenheit. As a fully submersible unit, it comes with two suction cups for versatile mounting in any horizontal or vertical position within your aquarium.

Intuitive Heater with Built-in Thermometer

This unit’s thermometer has a monitoring range of 0°C to 50°C (32°F to 122°F), ensuring accurate real-time temperature monitoring. A long-lasting, replaceable battery powers it.
The three-digit digital display provides precise readings to one decimal place, enhancing the accuracy of temperature tracking.
The compact design allows it to be attached to the fish tank wall without occupying valuable space, and it features a built-in temperature probe for robust functionality.

Durable Quartz Glass Construction

The 998 aquarium heater tube is crafted from heat-resistant quartz glass with a thickness of up to 2mm. This makes it explosion-proof and suitable for both freshwater and saltwater environments. With proper care, the service life of this heater can extend to over 3 years. It utilizes white alundum sand as a heat-conducting medium for efficient heat distribution.

Submersion Requirement

For safe operation, this heater must be fully submerged in water. It can be positioned horizontally or vertically near the water intake or in areas with water flow to ensure optimal heat circulation.

Safety with Overheat Protection

Equipped with an automatic shut-off feature, the heater will cease operation if the water temperature exceeds 93°F, preventing overheating and ensuring the safety of your aquatic environment.

Instructions for Use

Usage Instructions for hygger ETL Certified Aquarium Heater

1. Select the desired temperature for your aquarium.
2. Rotate – Once you’ve determined the temperature, use the rotary knob to align the red indicator bar with the corresponding temperature on the scale.
3. Suck – Attach the suction cup to the inside of your fish tank, ensuring that the heater is fully submerged in water.
4. Run – Connect the heater to a power source; the work indicator light will turn on, signaling that the heater is now operational.

Thermometer Instructions

1. The thermometer is supplied with a battery. Ensure it is tightened during installation. If there is no display after installing the battery, check that the battery is not depleted or inserted in the incorrect direction.
2. Attach the suction cup portion of the thermometer to the fish tank wall, positioning the display at a different angle from the suction cup, not on the same horizontal line. This positioning allows for easier viewing of the temperature readings.

How to Adjust the Heater Temperature?

Rotate the knob on the temp controller to set it to your desired temperature. The temp range is 68-93℉.

User Tips for Safe and Effective Operation:

1. For optimal performance and safety, thoroughly read and adhere to the instructions provided in the user manual.
2. Ensure the aquarium heater is always fully submerged in water to prevent damage and ensure even heating.
3. For optimal circulation, attach the heater horizontally or vertically to the side of the tank near the water intake or along the water flow path.
4. Avoid burying the heating element in sand or stones, as this can insulate the heater and lead to overheating.
5. Keep the temperature controller dry and away from water to prevent electrical issues.
6. Do not connect the power supply until the aquarium securely installs the heater.
7. Allow the heating element to cool down before moving the heater or changing the water to avoid the risk of breaking the glass.