Introduction
The Sunsun HJ-311B Hang-On Internal Filter is designed for efficient filtration in freshwater and marine aquariums. This compact and energy-efficient filter provides mechanical, chemical, and biological filtration to maintain clean and healthy water conditions for your aquatic inhabitants. This manual provides detailed instructions for the safe installation, operation, and maintenance of your HJ-311B filter.
Safety Information
- Always disconnect the power supply before performing any maintenance or cleaning on the filter.
- Ensure your hands are dry when plugging or unplugging the unit to prevent electrical shock.
- Do not operate the filter if the power cord or plug is damaged.
- This appliance is intended for indoor use only, specifically for aquarium filtration.
- Keep out of reach of children.
- Ensure the filter is fully submerged in water during operation to prevent damage to the motor.
Package Contents
Please check the package to ensure all components are present:
- 1 × Sunsun HJ-311B Filter Unit
- 1 × Power Cord with Plug
- 1 × Spray Bar (multi-hole water output pipe)
- 1 × Air Intake Tube
- 1 × Air Flow Regulator
- Various Connectors/Adapters for assembly
Specifications
| Feature | Specification |
|---|---|
| Model | HJ-311B |
| Type | Hang-on Internal Filter (Water Pump) |
| Voltage | 220-240V 50Hz |
| Power | 6W |
| Max Lift | 0.6 meters |
| Flow Rate | 300 L/H |
| Dimensions (L x W x H) | 133mm x 44mm x 36mm (approximate main unit) |
| Application | Freshwater and Marine Aquariums |
Product Overview
The Sunsun HJ-311B is a compact internal filter designed to be hung on the rim of your aquarium. It features a submersible pump that draws water through filter media, providing comprehensive filtration. The unit includes an adjustable spray bar for water output and an air intake tube with a regulator for aeration.
Setup Instructions
Follow these steps to set up your Sunsun HJ-311B filter:
- Unpack Components: Carefully remove all parts from the packaging. Refer to Figure 1 and Figure 6 to identify all components.
- Assemble Output: Attach the spray bar and any necessary connectors to the water output nozzle of the filter unit. Ensure a snug fit.
- Attach Air Intake: Connect the air intake tube to the designated port on the filter unit. Attach the air flow regulator to the end of the air intake tube.
- Position Filter: Hang the assembled filter unit onto the rim of your aquarium. Ensure the filter is securely seated and the water intake is fully submerged in the aquarium water. The water level in your aquarium must be above the minimum water line indicated on the filter (if present) for proper operation.
- Check Connections: Double-check all connections to ensure they are secure and there are no leaks.
- Power On: Once the filter is correctly positioned and submerged, plug the power cord into a suitable electrical outlet. The filter should start operating immediately.
Operating Instructions
- Continuous Operation: The filter is designed for continuous operation to maintain water quality.
- Water Level: Always ensure the water level in your aquarium is sufficient to keep the filter fully submerged. Running the filter dry can damage the motor.
- Air Flow Adjustment: Use the air flow regulator on the air intake tube to adjust the amount of air introduced into the aquarium, controlling the aeration level.
- Water Flow: The spray bar helps to distribute filtered water evenly and can be adjusted to direct the flow as needed.
Maintenance
Regular maintenance is crucial for the optimal performance and longevity of your filter:
- Disconnect Power: ALWAYS unplug the filter from the power outlet before performing any maintenance.
- Clean Filter Media: Periodically remove the filter media (e.g., sponge) from the filter unit. Rinse it thoroughly with old aquarium water (not tap water, as chlorine can kill beneficial bacteria) to remove accumulated debris. Replace media if it is heavily clogged or degraded.
- Clean Impeller: Carefully remove the impeller cover and the impeller itself. Clean the impeller and its housing with a small brush to remove any slime or debris that may impede its rotation.
- Clean Intake/Output: Clean the air intake tube, air flow regulator, and spray bar to ensure unobstructed water and air flow.
- Reassemble: Reassemble all parts, ensuring they are correctly fitted.
- Restart: Re-hang the filter, ensure it's submerged, and plug it back in.
Frequency of cleaning depends on your aquarium's bioload, but a general guideline is every 2-4 weeks.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Filter not starting/no power | Not plugged in; power outage; faulty outlet; damaged cord. | Check power connection; test outlet; inspect cord for damage. |
| Reduced water flow | Clogged filter media; dirty impeller; blocked intake/output. | Clean filter media, impeller, and all tubes/nozzles. |
| Excessive noise | Dirty/damaged impeller; air trapped in filter; filter not fully submerged. | Clean/inspect impeller; gently shake filter to release air; ensure proper water level. |
| No air bubbles from air intake | Air intake tube clogged; air flow regulator closed; water level too low. | Clean air intake tube; open air flow regulator; ensure proper water level. |
User Tips
- Filter Media Customization: While the filter comes with standard media, you can often customize it with activated carbon, ceramic rings, or other specialized media to target specific water quality issues.
- Water Changes: Even with efficient filtration, regular partial water changes are essential for maintaining a healthy aquarium environment.
- Placement: Position the filter to create good water circulation throughout the tank, preventing dead spots where debris can accumulate.
- Spare Parts: Consider having spare filter media or an impeller on hand for quick replacements if needed.
Warranty and Support
For warranty information or technical support, please refer to the documentation provided with your purchase or contact the seller directly. Keep your proof of purchase for any warranty claims.





