New Arrivals: CF-400 and CF-600 Hang On Aquarium Filters

We've added two new hang on back aquarium filters to our range, the CF-400 and CF-600. Both combine the compact, out-of-view convenience of an external hang-on filter with a media chamber more typically found in a canister filter, and both include a built-in surface skimmer to clear oils, film and floating debris from the water surface. They're aimed at nano, tropical and planted aquariums, with the two models covering different flow rates and tank sizes. If you're not sure which filter suits your setup, checking your tank's volume against the Aquarium Filter Size Calculator is a useful first step before choosing between the two.

Aquarium Hang On Filter 300L/H with Surface Skimmer - CF-400

The CF-400 has a maximum flow rate of up to 300L/H and is suited to aquariums 40-50cm in length. It provides multi-stage mechanical and biological filtration via multiple media trays, plus adjustable flow control for gentler circulation in shrimp and nano tanks or stronger movement in community aquariums. See the full listing: Aquarium Hang On Filter 300L/H with Surface Skimmer - CF-400.

Aquarium Hang On Filter 500L/H with Surface Skimmer - CF-600

The CF-600 has a maximum flow rate of up to 500L/H and is suited to larger aquariums measuring 60-80cm in length. Like the CF-400, it uses multiple media trays for customisable mechanical and biological filtration and has adjustable flow control. It's part of our range of Hang On Back Fish Tank Filters for Aquariums. See the full listing: Aquarium Hang On Filter 500L/H with Surface Skimmer - CF-600.

Choosing Between the Two

Matching filter capacity to your aquarium is important for both mechanical clarity and biological stability. Both filters use replaceable aquarium filter media across multiple trays, so you can tailor the balance of mechanical and biological filtration to your setup, whether that's a lightly stocked nano aquarium or a densely planted aquarium with tropical community fish. The surface skimmer on both models runs continuously to help keep the water surface free of film, which supports better gas exchange at the surface.

Frequently Asked Questions

What is the difference between the CF-400 and CF-600?

The CF-400 has a maximum flow rate of 300L/H and is suited to aquariums 40-50cm in length, while the CF-600 has a maximum flow rate of 500L/H and is suited to aquariums 60-80cm in length. The CF-600 is also physically larger, at 195 x 105 x 295mm compared to the CF-400's 140 x 90 x 220mm.

What does the surface skimmer do?

The built-in surface skimmer on both the CF-400 and CF-600 continuously removes surface film, oils and floating debris from the water, which helps improve water clarity and oxygen exchange.

What type of filtration do these filters provide?

Both the CF-400 and CF-600 provide multi-stage mechanical and biological filtration, using multiple media trays that can be customised to suit your aquarium's needs.

What is the maximum glass thickness these filters can be used with?

Both the CF-400 and CF-600 are designed for a maximum glass thickness of 12mm.

Can flow rate be adjusted on these filters?

Yes, both the CF-400 and CF-600 have adjustable flow control, allowing gentler circulation for shrimp and nano fish tanks or increased water movement for tropical community aquariums.