Fluval External Filter Replacement Canister - 205/206
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Product Information
Full details
The Fluval External Filter Replacement Canister is designed for aquarium hobbyists using Fluval 205 or 206 external filter models who need to replace a damaged or worn housing to restore optimal filtration performance. It provides a perfect, leak-proof seal that ensures your mechanical, chemical, and biological media function at their peak, though it is important to verify your specific filter model series (205/206 vs 405/406) before purchasing to ensure full compatibility.
All features
| Brand | Fluval |
|---|
Extended Product Information
FAQs
Will this work with a Fluval 406?
No, this canister is sized specifically for the 205/206 models. The 405/406 series requires a larger canister size.
Does this include the O-ring?
The canister usually ships as the housing body. We recommend cleaning and reusing your existing O-ring or purchasing a new one separately if yours is damaged.
Can I use this for other filter brands?
No, this is a proprietary Fluval part designed specifically for their 205 and 206 external filter systems.
How do I know if my canister needs replacing?
Look for visible hairline cracks, warped plastic edges, or if the filter head locking clips no longer hold a tight, pressurized seal.
Is it safe for saltwater aquariums?
Yes, the materials are corrosion-resistant and safe for both freshwater and marine aquarium setups.
Troubleshooting
Water leaking from under the filter head
Check that the canister is perfectly seated and ensure the O-ring is clean, lubricated, and properly positioned in the groove.
Difficulty locking the filter clips
Verify that the filter head is fully pushed down onto the canister and that no debris is obstructing the clip contact points.
Pros and Cons
Pros
- Exact fit for Fluval 205 and 206 models
- Restores original operational efficiency
- Durable, long-lasting construction
- Prevents water leaks associated with cracked or worn housings
Cons
- Not compatible with 405/406 series
- Requires careful transfer of delicate O-rings
- Does not include replacement media or internal trays
Setup, Compatibility & Care
To install, first unplug your filter and shut off the AquaStop valves to prevent water spillage. Disconnect the filter head from the old canister and carefully inspect the O-ring seals for any wear; ensure the O-ring is cleaned and lubricated with silicone grease before transferring it to the new canister. When seating the filter head onto the new canister, press down firmly and lock the clips in a cross-pattern to ensure an even seal. For care, avoid using abrasive chemical cleaners on the plastic, as these can degrade the material. Simply rinse the canister with warm, dechlorinated water during routine maintenance cycles.