1. Product Overview
The SOBO Glass Aquarium Heater 50W is an automatic, completely submersible heating device designed to maintain a stable and healthy water temperature for your aquatic pets. It features a sensitive and reliable thermostat that automatically regulates the water temperature within a range of 20-32° Celsius (68-90° Fahrenheit). The compact and efficient heating element ensures consistent performance, while double insulation and a power indicator lamp provide operational status feedback.
Key Features:
- Completely Submersible: Designed for full immersion in aquarium water.
- Automatic Thermostat: Maintains desired temperature between 20-32°C (68-90°F).
- Adjustable Temperature: Easy-to-set temperature dial.
- Double Insulation: Enhances safety and durability.
- Power Indicator Lamp: Visually confirms heating operation.
- Secure Mounting: Includes strong support clips and suction cups for stable placement.
2. Safety Information
Please read and understand all safety instructions before operating this device. Failure to follow these instructions may result in electric shock, fire, or damage to the product or your aquarium.
- Full Submersion Required: This heater must be completely submerged in water at all times during operation. Operating the heater in air can cause the glass to crack due to rapid temperature changes, posing a risk of electric shock and harm to aquatic life.
- Unplug Before Handling: Always unplug the heater from the power outlet before performing any maintenance, cleaning, or water changes in the aquarium. This prevents electric shock hazards.
- Inspect for Damage: Before each use, inspect the heater for any signs of damage, such as cracks in the glass, frayed power cords, or loose connections. Do not use a damaged heater.
- Proper Placement: Ensure the heater is securely mounted and positioned away from direct substrate contact to allow for proper water circulation around the heating element.
- Voltage Compatibility: Ensure the heater's voltage rating matches your local power supply.
- Children and Pets: Keep the heater and its power cord out of reach of children and pets to prevent accidental damage or injury.
- Indoor Use Only: This product is designed for indoor aquarium use only.
3. Package Contents
Verify that all items are present and in good condition upon unpacking:
- SOBO Glass Aquarium Heater 50W
- Suction Cups (2x)
- Support Clips (2x)

Image 3.1: SOBO Glass Aquarium Heater 50W in its retail packaging, showing the heater and its components.
4. Setup Instructions
- Unpack the Heater: Carefully remove the heater and all accessories from the packaging. Inspect for any damage.
- Attach Suction Cups: Securely attach the provided suction cups to the support clips on the heater body.
- Position in Aquarium:
- Place the heater inside your aquarium, ensuring it is fully submerged in water.
- For optimal heat distribution and safety, it is recommended to place the heater horizontally near the bottom of the tank, away from the substrate, or vertically in an area with good water flow.
- Use the suction cups to firmly attach the heater to the aquarium glass.

Image 4.1: The SOBO Glass Aquarium Heater 50W showing its design and suction cups for mounting.
- Connect to Power: Once the heater is fully submerged and securely placed, plug the power cord into a suitable electrical outlet. Ensure your hands are dry before handling the plug.
5. Operating Instructions
- Set Desired Temperature: Rotate the temperature adjustment dial located at the top of the heater to your desired water temperature. The heater can be set between 20°C and 32°C (68°F and 90°F).
- Monitor Power Indicator: The power indicator lamp will illuminate when the heater is actively heating the water. It will turn off once the set temperature is reached and will cycle on and off to maintain the temperature.
- Temperature Calibration: It is important to note that the heater's internal thermostat may not be precisely calibrated to external thermometers. For accurate temperature control, use a separate, reliable aquarium thermometer to monitor the actual water temperature. Adjust the heater's dial incrementally over several days until the desired stable temperature is achieved on your external thermometer.
- Allow Stabilization: After initial setup or temperature adjustment, allow several hours for the water temperature to stabilize before making further adjustments.

Image 5.1: The SOBO Glass Aquarium Heater 50W showing its power cord and plug, ready for connection.
6. Maintenance
Regular maintenance ensures the longevity and efficient operation of your heater.
- Cleaning: Periodically clean the heater's glass tube to remove algae or mineral deposits. Always unplug the heater and allow it to cool completely before removing it from the water for cleaning. Use a soft cloth or sponge and aquarium-safe cleaning solutions if necessary.
- Inspection: Regularly check the heater for any signs of wear, damage, or cracks. Ensure the power cord is intact and not frayed.
- Water Changes: During water changes, ensure the heater remains fully submerged. If the water level drops below the heater, unplug it immediately to prevent damage.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Heater not heating / Water too cold |
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| Water too hot |
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| Heater glass cracked |
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8. Specifications
| Brand | SOBO |
| Model Number | 6925394840060 |
| Power | 50 Watt |
| Material | Glass |
| Temperature Range | 20-32° Celsius (68-90° Fahrenheit) |
| Product Dimensions | 25.9L x 8.1W Centimeters |
| Special Feature | Automatic, Submersible |
| Country of Origin | India |
| Item Weight | 1 Kilogram |
9. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the documentation provided at the time of purchase or contact your retailer. Keep your proof of purchase for warranty claims.