Order processing time: 3–5 business days
Maintain a stable and comfortable aquatic environment with the Hygger ETL Heater HG998-50W, a fully submersible aquarium heater designed for freshwater and saltwater aquariums up to 15 gallons. Featuring adjustable temperature control, durable quartz glass construction, and built-in safety protection, this compact 50W heater provides reliable heating for smaller aquarium setups.
The Hygger HG998-50W combines a convenient top-mounted temperature adjustment knob with an automatic thermostat that switches the heating element on and off as needed. Its adjustable temperature range of 68°F–93°F (20°C–34°C) allows aquarium owners to select suitable conditions for tropical fish, shrimp, and other temperature-sensitive aquatic inhabitants.
Built with a 2mm-thick quartz glass heating tube, secure double suction cup mounting, and ETL-certified electrical safety features, this heater offers a practical solution for maintaining aquarium water temperature throughout the year.
Benefits of the Hygger ETL Heater HG998-50W
50W Aquarium Heating: Designed for small freshwater and saltwater aquariums up to 15 gallons.
ETL-Certified Design: Features electrical safety certification for added confidence during aquarium use.
Adjustable Temperature Range: Set the desired temperature between 68°F and 93°F (20°C–34°C).
Automatic Thermostat Operation: Cycles heating on and off to help maintain the selected water temperature.
2mm-Thick Quartz Glass: Provides a durable, heat-resistant heating tube.
Built-In Overheating Protection: Designed to stop heating if the detected temperature exceeds the safety threshold.
Dry-Run Safety Fuse: Provides additional protection if the heater is operated outside water.
Easy Rotary Temperature Control: Adjust the thermostat using the top-mounted knob and temperature scale.
Fully Submersible Construction: Designed for underwater installation according to the manufacturer's instructions.
Double Suction Cup Mounting: Helps secure the heater inside the aquarium.
Freshwater and Saltwater Compatibility: Suitable for a variety of small aquatic environments.
Separate Digital Thermometer: Allows convenient monitoring of aquarium water temperature.
Designed for Aquariums Up to 15 Gallons
The Hygger HG998-50W is the 50-watt model in Hygger's HG998 aquarium heater series.
It is recommended for aquariums with a capacity of up to 15 gallons, making it suitable for smaller tropical freshwater tanks, betta aquariums, planted aquariums, and appropriately sized marine systems.
Maintaining a stable water temperature is essential for many aquarium inhabitants. Sudden temperature fluctuations can affect fish behavior, feeding, metabolism, and general well-being.
The Hygger HG998-50W helps reduce these fluctuations by automatically regulating its heating cycle according to the selected thermostat setting.
Heater performance depends on aquarium volume, room temperature, tank insulation, water circulation, and the difference between ambient temperature and the desired water temperature.
In particularly cold environments, additional heating capacity may be required.
Adjustable Temperature Control from 68°F to 93°F
The Hygger HG998-50W features a convenient rotary adjustment knob positioned at the top of the heater.
Users can select a temperature between 68°F and 93°F (20°C–34°C) by turning the knob until the indicator aligns with the desired setting on the temperature scale.
Once the heater is connected to power and fully submerged, the internal thermostat monitors the surrounding water temperature.
When the water temperature falls below the selected setting, the heating element activates.
When the desired temperature is reached, the thermostat switches the heating element off.
This automatic heating cycle helps maintain consistent water conditions without requiring continuous manual adjustment.
For best results, use the included thermometer to monitor actual aquarium temperature and make gradual adjustments when necessary.
ETL-Certified Safety and Protective Features
The Hygger HG998 aquarium heater incorporates several protective features designed to support safer aquarium heating.
ETL-Certified Electrical Design
The HG998 series is marketed with ETL certification, indicating that the product has undergone applicable electrical safety testing.
This certification provides additional reassurance when selecting an electrical appliance intended for aquarium use.
Overheating Protection
The heater includes a safety feature designed to stop heating when the detected water temperature exceeds approximately 93°F (34°C).
This helps reduce the risk of excessive heating caused by abnormal operating conditions.
Dry-Run Protection
The HG998 features an internal safety fuse designed to disconnect heating power if the heater remains out of water while operating for more than approximately three minutes.
This is a protective backup feature, not permission to operate the heater outside the aquarium.
After a safety shutdown, the heater may require manual resetting according to the manufacturer's instructions.
Important: Always install and fully submerge the heater before connecting it to electricity. Never intentionally test the dry-run protection.
Durable 2mm Quartz Glass Heating Tube
The Hygger HG998-50W features a heating tube made from approximately 2mm-thick heat-resistant quartz glass.
This construction is designed to withstand normal aquarium heating conditions while helping protect the internal heating components.
The heater also uses efficient heating wire and heat-conducting material to distribute warmth through the surrounding water.
Its black finish allows the unit to blend more discreetly into many aquarium backgrounds.
Although the glass tube is designed for durability, it must still be handled carefully to prevent cracks or damage from impacts, hard decorations, or improper installation.
Digital Thermometer for Water Temperature Monitoring
The Hygger HG998 series includes a compact digital aquarium thermometer for checking water temperature independently of the heater's thermostat setting.
The thermometer features a three-digit display that provides easy-to-read temperature information.
Its measurement range is approximately 32°F–122°F (0°C–50°C), allowing users to monitor normal aquarium conditions.
An independent thermometer is especially useful because the temperature selected on a heater's adjustment dial may differ slightly from the actual temperature elsewhere in the aquarium.
For accurate monitoring, position the thermometer where it can measure representative aquarium water temperature rather than directly beside the heating element.
Suitable Aquarium Applications
The Hygger ETL Heater HG998-50W is suitable for appropriately sized setups, including:
Freshwater aquariums up to 15 gallons
Small tropical community aquariums
Betta fish tanks requiring heated water
Small planted freshwater aquariums
Freshwater shrimp tanks where supplemental heating is appropriate
Small saltwater aquariums
Nano aquarium systems requiring temperature regulation
Indoor aquariums exposed to seasonal room temperature changes
Always choose the target water temperature according to the requirements of the fish, shrimp, plants, or other aquatic inhabitants being kept.
Installation and Usage Guidelines
Check the heater: Inspect the quartz glass tube, power cord, plug, and mounting components for visible damage before installation.
Attach the suction cups: Secure the mounting suction cups to the heater.
Select a suitable position: Install the heater in an area with good water circulation, following the manufacturer's positioning instructions.
Fully submerge the heater: Ensure the heater is properly immersed and the aquarium water level remains above the minimum water-level marking.
Set the desired temperature: Turn the top-mounted adjustment knob to the required temperature.
Connect the power: Once the heater is correctly installed underwater, connect it to an appropriate electrical outlet.
Monitor the heating cycle: Allow the thermostat to regulate the water temperature automatically.
Check the thermometer: Confirm that the aquarium reaches and maintains a suitable temperature.
Adjust gradually: Make small temperature adjustments when needed rather than changing the setting abruptly.
Inspect regularly: Check the heater, suction cups, and thermometer during routine aquarium maintenance.
Important Safety and Maintenance Guidelines
Never operate the heater outside water.
Disconnect the power before water changes, cleaning, or moving the heater.
Allow the heater to cool before removing it from the aquarium.
Do not use the heater if the glass tube or electrical cord is damaged.
Maintain sufficient water circulation for even heat distribution.
Avoid placing the heater where gravel, rocks, or decorations could strike the glass.
Keep the electrical plug and outlet dry, and use a drip loop in the power cord.
Follow the manufacturer's installation and safety instructions at all times.
Product Specifications
Brand: Hygger
Product Name: ETL Certification Aquarium Heater
Model: HG998-50W
Series: HG998
Power Rating: 50W
Recommended Aquarium Capacity: Up to 15 gallons
Water Compatibility: Freshwater and saltwater
Heater Type: Fully submersible aquarium heater
Temperature Control Range: 68°F–93°F (20°C–34°C)
Temperature Adjustment: Top-mounted rotary knob
Thermostat: Automatic heating control
Heater Tube Material: Quartz glass
Glass Thickness: Approximately 2mm
Heater Dimensions: Approximately 10.4 × 1.3 inches (26.4 × 3.3cm)
Power Cord Length: Approximately 5.9 feet (1.8m)
Input Voltage: 110–120V AC, 60Hz or 220–240V AC, 50Hz, depending on regional version
Safety Features: ETL-certified design, overheating protection, and dry-run safety fuse
Mounting: Double suction cup system
Temperature Monitoring: Separate digital thermometer
Thermometer Measurement Range: Approximately 32°F–122°F (0°C–50°C)
Color: Black
Primary Application: Temperature regulation in small freshwater and marine aquariums
Specifications are based on Hygger's published HG998 product information. Confirm the voltage of the supplied unit matches your local electrical supply before use.
Package Includes
1 × Hygger HG998-50W Aquarium Heater
2 × Mounting Suction Cups
1 × Digital Aquarium Thermometer
1 × User Manual
Reliable Heating for Small Freshwater and Saltwater Aquariums
The Hygger ETL Heater HG998-50W is a practical heating solution for aquarium owners who want adjustable temperature control, automatic thermostat operation, and built-in safety protection.
With its 50W heating element, 68°F–93°F temperature range, 2mm quartz glass tube, ETL-certified construction, and convenient suction cup mounting, this heater helps maintain comfortable conditions for suitable aquarium inhabitants.
Its compact design and freshwater and saltwater compatibility make it a versatile option for smaller aquatic setups.
Order the Hygger HG998-50W ETL Aquarium Heater today and maintain a more stable, comfortable water temperature in your aquarium.
Order processing time: 3–5 business days
Maintain a stable and comfortable aquatic environment with the Hygger ETL Heater HG998-50W, a fully submersible aquarium heater designed for freshwater and saltwater aquariums up to 15 gallons. Featuring adjustable temperature control, durable quartz glass construction, and built-in safety protection, this compact 50W heater provides reliable heating for smaller aquarium setups.
The Hygger HG998-50W combines a convenient top-mounted temperature adjustment knob with an automatic thermostat that switches the heating element on and off as needed. Its adjustable temperature range of 68°F–93°F (20°C–34°C) allows aquarium owners to select suitable conditions for tropical fish, shrimp, and other temperature-sensitive aquatic inhabitants.
Built with a 2mm-thick quartz glass heating tube, secure double suction cup mounting, and ETL-certified electrical safety features, this heater offers a practical solution for maintaining aquarium water temperature throughout the year.
Benefits of the Hygger ETL Heater HG998-50W
50W Aquarium Heating: Designed for small freshwater and saltwater aquariums up to 15 gallons.
ETL-Certified Design: Features electrical safety certification for added confidence during aquarium use.
Adjustable Temperature Range: Set the desired temperature between 68°F and 93°F (20°C–34°C).
Automatic Thermostat Operation: Cycles heating on and off to help maintain the selected water temperature.
2mm-Thick Quartz Glass: Provides a durable, heat-resistant heating tube.
Built-In Overheating Protection: Designed to stop heating if the detected temperature exceeds the safety threshold.
Dry-Run Safety Fuse: Provides additional protection if the heater is operated outside water.
Easy Rotary Temperature Control: Adjust the thermostat using the top-mounted knob and temperature scale.
Fully Submersible Construction: Designed for underwater installation according to the manufacturer's instructions.
Double Suction Cup Mounting: Helps secure the heater inside the aquarium.
Freshwater and Saltwater Compatibility: Suitable for a variety of small aquatic environments.
Separate Digital Thermometer: Allows convenient monitoring of aquarium water temperature.
Designed for Aquariums Up to 15 Gallons
The Hygger HG998-50W is the 50-watt model in Hygger's HG998 aquarium heater series.
It is recommended for aquariums with a capacity of up to 15 gallons, making it suitable for smaller tropical freshwater tanks, betta aquariums, planted aquariums, and appropriately sized marine systems.
Maintaining a stable water temperature is essential for many aquarium inhabitants. Sudden temperature fluctuations can affect fish behavior, feeding, metabolism, and general well-being.
The Hygger HG998-50W helps reduce these fluctuations by automatically regulating its heating cycle according to the selected thermostat setting.
Heater performance depends on aquarium volume, room temperature, tank insulation, water circulation, and the difference between ambient temperature and the desired water temperature.
In particularly cold environments, additional heating capacity may be required.
Adjustable Temperature Control from 68°F to 93°F
The Hygger HG998-50W features a convenient rotary adjustment knob positioned at the top of the heater.
Users can select a temperature between 68°F and 93°F (20°C–34°C) by turning the knob until the indicator aligns with the desired setting on the temperature scale.
Once the heater is connected to power and fully submerged, the internal thermostat monitors the surrounding water temperature.
When the water temperature falls below the selected setting, the heating element activates.
When the desired temperature is reached, the thermostat switches the heating element off.
This automatic heating cycle helps maintain consistent water conditions without requiring continuous manual adjustment.
For best results, use the included thermometer to monitor actual aquarium temperature and make gradual adjustments when necessary.
ETL-Certified Safety and Protective Features
The Hygger HG998 aquarium heater incorporates several protective features designed to support safer aquarium heating.
ETL-Certified Electrical Design
The HG998 series is marketed with ETL certification, indicating that the product has undergone applicable electrical safety testing.
This certification provides additional reassurance when selecting an electrical appliance intended for aquarium use.
Overheating Protection
The heater includes a safety feature designed to stop heating when the detected water temperature exceeds approximately 93°F (34°C).
This helps reduce the risk of excessive heating caused by abnormal operating conditions.
Dry-Run Protection
The HG998 features an internal safety fuse designed to disconnect heating power if the heater remains out of water while operating for more than approximately three minutes.
This is a protective backup feature, not permission to operate the heater outside the aquarium.
After a safety shutdown, the heater may require manual resetting according to the manufacturer's instructions.
Important: Always install and fully submerge the heater before connecting it to electricity. Never intentionally test the dry-run protection.
Durable 2mm Quartz Glass Heating Tube
The Hygger HG998-50W features a heating tube made from approximately 2mm-thick heat-resistant quartz glass.
This construction is designed to withstand normal aquarium heating conditions while helping protect the internal heating components.
The heater also uses efficient heating wire and heat-conducting material to distribute warmth through the surrounding water.
Its black finish allows the unit to blend more discreetly into many aquarium backgrounds.
Although the glass tube is designed for durability, it must still be handled carefully to prevent cracks or damage from impacts, hard decorations, or improper installation.
Digital Thermometer for Water Temperature Monitoring
The Hygger HG998 series includes a compact digital aquarium thermometer for checking water temperature independently of the heater's thermostat setting.
The thermometer features a three-digit display that provides easy-to-read temperature information.
Its measurement range is approximately 32°F–122°F (0°C–50°C), allowing users to monitor normal aquarium conditions.
An independent thermometer is especially useful because the temperature selected on a heater's adjustment dial may differ slightly from the actual temperature elsewhere in the aquarium.
For accurate monitoring, position the thermometer where it can measure representative aquarium water temperature rather than directly beside the heating element.
Suitable Aquarium Applications
The Hygger ETL Heater HG998-50W is suitable for appropriately sized setups, including:
Freshwater aquariums up to 15 gallons
Small tropical community aquariums
Betta fish tanks requiring heated water
Small planted freshwater aquariums
Freshwater shrimp tanks where supplemental heating is appropriate
Small saltwater aquariums
Nano aquarium systems requiring temperature regulation
Indoor aquariums exposed to seasonal room temperature changes
Always choose the target water temperature according to the requirements of the fish, shrimp, plants, or other aquatic inhabitants being kept.
Installation and Usage Guidelines
Check the heater: Inspect the quartz glass tube, power cord, plug, and mounting components for visible damage before installation.
Attach the suction cups: Secure the mounting suction cups to the heater.
Select a suitable position: Install the heater in an area with good water circulation, following the manufacturer's positioning instructions.
Fully submerge the heater: Ensure the heater is properly immersed and the aquarium water level remains above the minimum water-level marking.
Set the desired temperature: Turn the top-mounted adjustment knob to the required temperature.
Connect the power: Once the heater is correctly installed underwater, connect it to an appropriate electrical outlet.
Monitor the heating cycle: Allow the thermostat to regulate the water temperature automatically.
Check the thermometer: Confirm that the aquarium reaches and maintains a suitable temperature.
Adjust gradually: Make small temperature adjustments when needed rather than changing the setting abruptly.
Inspect regularly: Check the heater, suction cups, and thermometer during routine aquarium maintenance.
Important Safety and Maintenance Guidelines
Never operate the heater outside water.
Disconnect the power before water changes, cleaning, or moving the heater.
Allow the heater to cool before removing it from the aquarium.
Do not use the heater if the glass tube or electrical cord is damaged.
Maintain sufficient water circulation for even heat distribution.
Avoid placing the heater where gravel, rocks, or decorations could strike the glass.
Keep the electrical plug and outlet dry, and use a drip loop in the power cord.
Follow the manufacturer's installation and safety instructions at all times.
Product Specifications
Brand: Hygger
Product Name: ETL Certification Aquarium Heater
Model: HG998-50W
Series: HG998
Power Rating: 50W
Recommended Aquarium Capacity: Up to 15 gallons
Water Compatibility: Freshwater and saltwater
Heater Type: Fully submersible aquarium heater
Temperature Control Range: 68°F–93°F (20°C–34°C)
Temperature Adjustment: Top-mounted rotary knob
Thermostat: Automatic heating control
Heater Tube Material: Quartz glass
Glass Thickness: Approximately 2mm
Heater Dimensions: Approximately 10.4 × 1.3 inches (26.4 × 3.3cm)
Power Cord Length: Approximately 5.9 feet (1.8m)
Input Voltage: 110–120V AC, 60Hz or 220–240V AC, 50Hz, depending on regional version
Safety Features: ETL-certified design, overheating protection, and dry-run safety fuse
Mounting: Double suction cup system
Temperature Monitoring: Separate digital thermometer
Thermometer Measurement Range: Approximately 32°F–122°F (0°C–50°C)
Color: Black
Primary Application: Temperature regulation in small freshwater and marine aquariums
Specifications are based on Hygger's published HG998 product information. Confirm the voltage of the supplied unit matches your local electrical supply before use.
Package Includes
1 × Hygger HG998-50W Aquarium Heater
2 × Mounting Suction Cups
1 × Digital Aquarium Thermometer
1 × User Manual
Reliable Heating for Small Freshwater and Saltwater Aquariums
The Hygger ETL Heater HG998-50W is a practical heating solution for aquarium owners who want adjustable temperature control, automatic thermostat operation, and built-in safety protection.
With its 50W heating element, 68°F–93°F temperature range, 2mm quartz glass tube, ETL-certified construction, and convenient suction cup mounting, this heater helps maintain comfortable conditions for suitable aquarium inhabitants.
Its compact design and freshwater and saltwater compatibility make it a versatile option for smaller aquatic setups.
Order the Hygger HG998-50W ETL Aquarium Heater today and maintain a more stable, comfortable water temperature in your aquarium.
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