Fluval FX2 FX4 FX5 FX6 Filter Cover

Fluval FX2 FX4 FX5 FX6 Filter Cover

This black Fluval FX filter lid is the genuine replacement cover designed specifically for the Fluval FX canister filters. Crafted to fit accurately and maintain performance, it ensures a tight seal and preserves the integrated Smart Pump™ functionality that makes the FX6 so reliable.

Made with the same precision engineering as the original, this lid safeguards the filter’s automatic priming, pressure regulation, and secure fit. It retains the FX6’s clear structural integrity while preserving the sleek aesthetic of your setup.

Compatible Features Include:

• Same multi-part fastener layout as original lid

• Seamless integration with Aqua-Stop valves, Smart Pump™, and media baskets

• Durable black finish that resists wear and enhances appearance

• Fits securely over the FX’s O-ring for leak-free performance

• Maintains ease of maintenance and routine access to media chambers

Available with accurate dimensions (matching all the FX canister footprints):

• Width/Length: approximately 400 mm

• Depth/Height: approximately 400 mm

This ensures a perfect fit without compromising water handling or filter capacity 

Why You Need a Replacement Lid

Over time, FX lids can show wear from O-ring degradation, cracked latches, or UV exposure. Using a compromised lid risks leaks, interference with priming, and mis operation of the Smart Pump™ system. Replacing the lid restores reliability and performance.

Ready to install—simply remove the old lid after draining your FX6, and swap in this replacement. The FX6’s user-friendly design ensures a seamless transition, returning your filter to full operation in minutes.