Fluval FX6 High Performance Canister Filter, up to 400 US Gal (1500 L)

Can I connect an inline heater model to my filter?

No. Fluval canister filters use ribbed flexible hosing, which is not ideal for installing such equipment.

Why do I have difficulty restarting my canister filter after cleaning it?

First, check your impeller and impeller shaft as it’s possible either of these are damaged and need to be replaced, or are very dirty and require cleaning. It’s also possible the impeller cover has not been reattached correctly. Finally, verify that the filter has been properly primed: always ensure that the filter output is above the water surface when priming.

I’ve noticed decreased performance and the need for increased maintenance frequency on my canister filter. Am I doing something wrong?

This usually indicates an increased load on your filter due to either the growth of your fish, the recent introduction of additional fish, increased waste production (leftover food, excrement, etc.), or clogged filter media in need of replacement.

I have a marine tank and noticed bursts of air coming out of my filter output. Should I be concerned?

Air input into your system is most likely coming from the skimmer. Fine air bubbles are gathering in the canister filter and are being ejected in bursts. Consider adding a bubble trap for your skimmer.

I’ve noticed decreased performance and the need for increased maintenance frequency on my canister filter. Am I doing something wrong?

This usually indicates an increased load on your filter due to either the growth of your fish, the recent introduction of additional fish, increased waste production (leftover food, excrement, etc.), or clogged filter media in need of replacement.

How does head height affect filter output performance?

FX series filters are closed recirculation filter systems: head height has no real impact on performance. The length of tubing and the types of filter media are key factors affecting filter output performance. We recommend never exceeding the specified vertical distance in your instruction manual as this will cause the filter to exceed the maximum head pressure value, which could cause the filter to leak and fail.

I change the carbon in my filter every couple of weeks. Is this too often?

No. It’s better (and easier) to prevent odors rather than having to remove them once they’ve accumulated. Some fish are messy eaters, or are more prone to producing large amounts of waste, so prevention is key.

3 YEAR LIMITED WARRANTY

The Fluval FX6 Canister Filter is guaranteed against defects in material and workmanship under normal aquarium usage and service for 3 years from date of purchase. Non-replaceable and non-serviceable parts will be repaired or replaced at Hagen’s discretion, free of charge, when the complete filter is returned with all components along with a valid proof of purchase and postage paid. This warranty does not apply to any filter that has been subject to misuse, negligence or tampering. It does not apply to filters which have been incorrectly assembled or unsuitably maintained or where installation and maintenance instructions have not been followed correctly. The warranty does not apply to wear and tear parts such as the impeller, impeller cover or motor seal. No liability is assumed with respect to loss or damage to livestock or personal property irrespective of the cause thereof. Before returning the filter under warranty terms, please ensure that all setup and maintenance instructions have been followed. If you are in doubt, please contact your local aquatic specialist retailer for further advice before returning the product.