Introduction
This manual provides detailed instructions for the installation, operation, maintenance, and troubleshooting of your new SUNSUN Aquarium External Filter. Please read this manual thoroughly before use to ensure proper function and longevity of your filter.
The SUNSUN Aquarium External Filter is designed for multi-stage filtration, providing effective water purification for your aquarium. It is available in models EW-602 and EW-603, supporting both 110V and 220-240V power supplies.
Important Safety Information
- Warning: Replace the filter cartridge regularly to maintain optimal filtration and water quality.
- Caution: Avoid applying excessive force during installation of components to prevent damage.
- Note: This product is not intended for use with non-potable water. Use only for aquarium filtration.
Package Contents
Please verify that all components are present before proceeding with installation.

EW-602B includes:
- Filter unit (Diameter 128 * 290MM)
- Inlet and outlet accessories
- 12mm boutique water pipe (1.5m * 2)
- Filter cotton (black, yellow, blue sponges)
- One 12mm outlet

EW-603B includes:
- Filter unit (Diameter 160 * 330MM)
- Inlet and outlet accessories
- 12mm boutique water pipe (1.5m * 2)
- Filter cotton (black, yellow, blue sponges)
- One 12mm outlet
Setup Instructions
- Install the filter cartridge: Insert the filter cartridge into the filter unit. Ensure it is oriented correctly, following the direction indicated by any arrows or guides within the unit.

Figure 3: Filter Media Layering (Black, Yellow, Blue Sponges) Ensure filter sponges are stacked correctly for multi-stage filtration.
- Connect to water supply: Attach the water pipes (inlet and outlet) to the filter unit and your aquarium. Securely tighten all fittings to prevent leaks.

Figure 4: Filter Assembly and Water Flow Diagram The diagram illustrates how to connect the filter to your aquarium and the direction of water flow through the filter media.
Operating Instructions
- Start using: Once the filter is fully assembled and connected, turn on the faucet or power switch to begin the filtration process. Ensure the unit is primed if necessary (refer to specific model instructions if priming mechanism is present).
Maintenance
- Filter Cartridge Replacement: Regularly replace the filter cartridge (sponges) to maintain efficient filtration and prevent water quality issues. The frequency depends on aquarium size, bioload, and water parameters.
- Cleaning: Periodically clean the filter unit and hoses to remove accumulated debris and ensure unrestricted water flow.
Troubleshooting
- Problem: Low water flow
Solution: Check whether the filter cartridge is clogged. Clean or replace the filter sponges as needed. Also, inspect hoses for kinks or blockages.
- Problem: Leakage
Solution: Reinstall the unit, ensuring all connections are tight. Check and replace any worn or damaged sealing rings (gaskets).
Specifications
| Feature | EW-602B | EW-603B |
|---|---|---|
| Product Model | EW-602B | EW-603B |
| Product Size (Diameter x Height) | 128mm x 290mm | 160mm x 330mm |
| Power (W) | 6W | 6W |
| Traffic (L/H) | 400L/H | 400L/H |
| Voltage | 110V 60Hz or 220-240V 50Hz (model dependent) | 110V 60Hz or 220-240V 50Hz (model dependent) |
| Type | Fish Aquarium Filter | |
Package Dimensions & Weight
- Length: 30 cm
- Width: 27 cm
- Height: 17 cm
- Weight: 1.688 kg
User Tips
- For optimal performance, ensure the filter is placed below the water level of the aquarium to facilitate proper water flow and priming.
- When cleaning filter media, rinse sponges in old aquarium water to preserve beneficial bacteria, rather than tap water which can kill them.
- Regularly check the intake strainer for debris to prevent clogging and maintain consistent flow.
Warranty and Support
Warranty Information
Warranty coverage applies to defects not caused by misuse or accidental damage. Please retain your proof of purchase for warranty claims.
Customer Support
For assistance, technical support, or warranty inquiries, please contact customer service through your retailer or the manufacturer's official channels.
A comprehensive user manual in PDF format is also available for download. Refer to the official product page or contact support for the link.





