Fluval C4 Power Filter

The Fluval C4 Power Filter is the larger model in Fluval’s C-Series of clip-on, hang-on-back filters. It provides five stages of filtration, two mechanical, one chemical and two biological, giving bigger aquariums excellent clarity and a strong biological filter.

Key features of the Fluval C4 Power Filter

• 5-stage filtration
• Two mechanical, one chemical, two biological
• Clip-on design
• Adjustable flow

Installing and maintaining it

As a hang-on-back filter, the C4 needs clear space behind the aquarium and a rim it can clip onto securely, so check both before buying, especially if your tank sits close to a wall or has a fitted hood. Before switching on for the first time, fill the filter body with tank water so the pump primes. Keep the water level high enough that the intake never sucks air. When servicing, rinse the mechanical media in old tank water, replace chemical media as it becomes exhausted, and never clean all the biological stages on the same day, so the bacteria that keep the water safe are not lost at once.

Good to know

Rinse the foam in old tank water and replace the chemical media regularly for best results.

Product details

• Brand: Fluval
• Brand website: fluvalaquatics.com
• Product: Fluval C4 Power Filter
• Category: Fish Filters & Media