Sobo AQ-18H Multifunctional Bio Top Filter 6 watts 500 L/H

The Sobo AQ-18H is a 6W multifunctional bio top filter delivering up to 500 L/H, combining mechanical and biological filtration in a clear, multi-compartment box that sits on the rim of the tank and returns water as an oxygenating waterfall. It frees up swimming space inside the tank, lets you customise the media stack for your livestock, and ships with a professional media kit (including ceramic media) for immediate water purification. A complete, space-saving overhead filter for small-to-medium tanks.

Why choose the Sobo AQ-18H?

• 3-stage filtration — mechanical and biological in a streamlined overhead unit.
• 500 L/H flow from an efficient 6W pump.
• Clear multi-compartment box so you can customise the media stack.
• Overhead, space-saving design that frees up room inside the tank.
• Includes a media kit (ceramic and more) for immediate use.

Specifications

Which tanks is it best for?

With 500 L/H, the AQ-18H suits small-to-medium tanks up to roughly 120L. It is a great choice if you want overhead filtration that keeps the tank interior clear and lets you tune your media. For multi-section top filters with more capacity see the Blue Pet BL-773W (700 L/H). Learn about media in our filter media guide.

How to set it up

Sit the filter box on the rim, load the included media (mechanical first, then biological), prime the pump and plug in. Keep it running 24/7, and rinse the mechanical media in old tank water (never tap water) when flow slows. See how to install an aquarium filter.

Frequently asked questions

What size tank is the AQ-18H for?

Small-to-medium tanks up to roughly 120L, based on its 500 L/H flow.

What media does it include?

A professional media kit including ceramic media, so you can start filtering immediately.

Can I customise the media?

Yes. The clear multi-compartment box lets you adjust the media stack to your livestock.

Does it oxygenate the water?

Yes. The waterfall-style return naturally aerates the water.

How often should I clean it?

Rinse the mechanical media in old tank water when flow drops, usually every 2–4 weeks.

New to filtration? Read our complete aquarium filter guide and how aquarium filters work.