Aquarium filter media
Fluval Poly-Carb Cartridge for U4 Underwater Filter, 2-Pack
A492
Fits 1 model · replace every month
Wrong part, or your model missing? Tell us. A person checks every report.
GenuineGenuine Fluval
$9.94 each
2-pack $19.88
Aquarium Spare Parts · 30 OctLowest genuine · Aquarium Spare Parts · checked 30 Oct
CompatibleCompatible option
$2.98 each
6-pack $17.88
Aquarium Spare Parts · 30 OctAquarium Spare Parts · checked 30 Oct
Check sellerCheck seller details
Genuine: made by Fluval. Compatible: another brand.Genuine is made by Fluval. Compatible is made by another brand. Check the seller's page for the size and models it fits.
Lowest compatibleLowest compatible price · $2.98 each · 6-pack $17.88
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Compare 5 listings from 3 sellers
AUD, before delivery. Each price shows when it was checked.
Compatible options
2 sellers
Genuine Fluval
3 sellers
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Get a nudge when your aquarium filter media is due — it's every month. One email two weeks before, no newsletter. Manage or stop it anytime.
How to change the A492 aquarium filter media
Watch the guide or follow the steps.
- 1Unplug the filter and lift it out of the aquarium.
- 2Open the filter and slide out the foam pad and the cartridge (U2 to U4 also hold BIOMAX).
- 3Rinse foam in water from the aquarium; rinse BIOMAX in aquarium water only: Fluval says never to rinse it with tap water.
- 4Fit a new carbon cartridge about every month (Fluval says carbon lasts about a month, and to change Poly-Carb cartridges every 2 to 4 weeks).
- 5Close the filter, put it back in the aquarium and plug it in.
Every number this part goes by
- Retail name:
- A-492
- Retail name:
- A492
Sellers list any of these; they are the same part.
Will it fit your appliance?
Type your model number and we'll check it against the makers' lists.
Fits this Fluval model
Fluval1 model
Common questions
- What does the A492 fit?
- The Fluval Poly-Carb Cartridge for U4 Underwater Filter, 2-Pack (part A492) fits the Fluval U4. Compatible filters made to the same specification also fit.
- How often should I replace the A492?
- Every month. It works less well as the filter fills up, so it's worth doing on time.
- Where can I buy the A492 in Australia?
- We track 3 Australian sellers for the A492; the lowest listed price when we last checked was A$2.98 at Aquarium Spare Parts. Prices are re-checked daily and dated on this page.
- How do I fit the A492?
- No tools, a few minutes: 5 steps, listed on this page with the replacement video where the maker has one.
- What happens if I don't change it?
- Spent carbon stops removing odours and discolouration, and clogged pads slow the flow, so the filter moves less water through the tank.
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