SOBO WP‑638H Slim Hang‑On Filter

✅ Key Features

Slim “hang‑on‑back” design—mounts neatly and saves internal tank space.

Built‑in surface skimmer: draws in and removes surface film, oils, and floating debris to improve light penetration and gas exchange.

Multi‑stage filtration: mechanical sponge + biological media + chemical cartridge for full water care.

Adjustable flow rate and low power consumption (~6.8 W) with a max flow around 500 L/h.

Suitable for both freshwater and marine tanks.

📏 Specifications

Model: WP‑638H

Power: ~6.8 W

Max Flow Rate: ~500 L/h

Recommended Tank Size: Up to approximately 100‑120 L (depending on load and setup)

Filtration Stages: Mechanical → Biological → Chemical

Special Feature: Surface skimmer intake at tank surface level

⚙️ How to Use

Hang the filter unit firmly on the rim of your aquarium with the skimmer intake at the water surface.

Fill the filter chamber with tank water before switching on to avoid air locks.

Turn on the unit and adjust the flow to suit your tank (lower flow for planted/shrimp setups, higher flow for community tanks).

Maintain regularly: rinse the mechanical sponge during water changes, replace chemical media as needed, and check the skimmer intake to clear any collected film.

Ensure the skimmer intake remains unobstructed for best surface cleaning performance.

🎯 Why Choose This Filter?

If you’re looking for a slim, effective filter that also handles surface cleaning without the need for a separate skimmer, the WP‑638H is an excellent choice. The integrated surface skimmer adds real value—especially in setups where a clear water surface and good gas exchange are important (planted tanks, shrimp tanks, etc.).
With its strong flow rate, low power draw, and space‑saving design, it’s ideal for medium aquariums where internal aesthetics and water quality both matter.