Fluval External Filter Replacement Canister - Fluval 405/406
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Product Information
Full details
The Fluval External Filter Replacement Canister is an essential maintenance component designed specifically for aquarium hobbyists using Fluval 405 or 406 external canister filter systems. It serves as a direct, high-quality replacement for damaged or worn original canisters, ensuring your filtration system maintains a secure seal and optimal water flow. While it restores factory-standard performance, users should note that this is the canister body only and does not include internal media baskets, impellers, or O-rings, which must be retained from the original unit.
All features
| Brand | Fluval |
|---|
Extended Product Information
FAQs
Does this include the O-ring seal?
No, this product is the canister housing only. You should reuse your existing O-ring or purchase a new one separately if yours is damaged.
Is this compatible with the Fluval 306?
No, this canister is specifically sized for the 405/406 series. The 306 uses a different physical dimensions.
What material is the canister made of?
It is made from high-impact, aquarium-safe ABS plastic.
Do I need to prime the filter after swapping the canister?
Yes, always use the manual primer button to draw water into the new canister before plugging the unit back into the wall outlet.
Will this fix a leak from the Aqua-Stop valve?
No, this is only the canister body. If your leak is at the valve connection, you likely need a replacement Aqua-Stop valve assembly.
Troubleshooting
Water leaking from the base after replacement
Ensure the main lid O-ring is properly seated in the groove and free of debris.
Filter is making a loud rattling noise
Verify that the internal media trays are stacked correctly and the impeller housing is firmly attached to the motor head.
Difficulty snapping the locking clips down
Check that the O-ring is not pinched and that the filter head is pushed down evenly against the canister rim.
Pros and Cons
Pros
- Perfect compatibility with Fluval 405 and 406 series filters
- High-grade, impact-resistant material for long-term reliability
- Restores the integrity of the filter housing to prevent leaks
- Cost-effective solution to avoid replacing the entire filter system
Cons
- Does not include replacement gaskets or O-rings
- Internal media baskets are not included
- Requires careful transfer of existing internal components
Setup, Compatibility & Care
This replacement canister is strictly compatible with the Fluval 405 and 406 external canister models. It is not compatible with the 205/206 series or the newer 07 series filters.
Installation Steps:
- Unplug the filter from the electrical power source.
- Disconnect the aqua-stop valve assembly and remove the filter head.
- Remove the internal media baskets and inspect them for wear.
- Clean the existing O-ring gasket and apply a light layer of silicone lubricant if necessary before seating it on the new canister.
- Reassemble the filter head, lock the side clips, and reconnect the hoses.
- Prime the filter according to your manual's instructions to ensure all air is purged before turning the power on.