SUNSUN XBL-400 HOB Filter with Skimmer

Hang-On-Back (HOB) filter for small to medium aquariums with multi-stage filtration and surface skimming

1. Product Overview

• A HOB filter that hangs on the back of the aquarium.

• Provides mechanical, chemical, and biological filtration.

• Includes a built-in surface skimmer to remove surface debris, oils, and films, improving water quality and oxygen exchange.

• Saves internal tank space, keeping the aquarium layout neat.

2. Technical Specifications

• Power consumption: ~5 W

• Flow rate: ~300 L/hour

• Recommended tank size: Small to medium aquariums (~40–50 cm length)

• Filtration stages: Mechanical, Chemical, Biological + Surface Skimmer

• Design: Compact hang-on unit with detachable inlet/outlet for easy maintenance

• Operation: Quiet and energy-efficient

3. Key Benefits

• Multi-stage filtration: Cleans water thoroughly while supporting beneficial bacteria.

• Surface skimmer: Removes oils and debris from the water surface, improving oxygenation.

• Space-saving: Keeps interior tank free from bulky filter equipment.

• Easy installation: Hang on the back and plug in—simple setup.

• Suitable for small to medium community and planted tanks.

• Quiet and energy-efficient operation.

4. Limitations / Considerations

• Limited capacity: Not ideal for large tanks or heavy bioload.

• Supplementary filtration may be needed for heavily stocked tanks.

• Maintenance required: Filter media and skimmer need periodic cleaning.

• Flow may be insufficient for tanks requiring strong circulation.

• Water level sensitive: Must maintain proper water level for effective skimming.

5. Ideal Use Cases

• Small to medium aquariums with small or medium fish.

• Community tanks or lightly stocked setups.

• Planted aquariums where a clean surface is important.

• Hobbyists wanting an easy, low-maintenance, space-saving filter.

6. Setup & Maintenance Tips

• Hang securely on the back of the tank with intake properly submerged.

• Prime filter before first use to avoid dry-run.

• Clean or rinse filter media, skimmer intake, and impeller regularly.

• Supplement filtration if tank is heavily stocked.

• Keep water level stable for optimal surface skimming.

7. Summary

The SUNSUN XBL-400 HOB Filter with Skimmer is a budget-friendly, reliable option for small-to-medium aquariums. It combines multi-stage filtration with surface cleaning in a compact, easy-to-install HOB unit. Ideal for community tanks, planted tanks, or moderate setups where simplicity, cleanliness, and convenience matter.