The Fluval Nano Aquarium Filter takes the Fluval Carbon Cartridge for Nano Aquarium Filter, 2-Pack (part A458) as its carbon filter; replace it every month; Australian sellers list it from A$3.94 each as of 30 October 2026. Fitment confirmed against the manufacturer's compatibility list.
Your aquarium filter
Fluval Nano Aquarium Filter
Aquarium filter
Confirmed against Fluval's listConfirmed against Fluval's own compatibility list
Not yours? ChangeSave it · remind me every month
Takes the A458 carbon filter
Carbon Cartridge for Nano Aquarium Filter, 2-Pack · replace every month · check the code printed on your old filter before ordering.
Your aquarium filter
Aquarium filter
Confirmed against Fluval's listConfirmed against Fluval's own compatibility list
Takes the A458
Carbon filter · every month · check the code on your old filter.
Other Fluval aquarium filters and their replacement media
The A458 fits the Nano Aquarium Filter only. These Fluval models take a different carbon filter:
GenuineGenuine Fluval
$3.94 each
2-pack $7.88
Aquarium Spare Parts · 30 OctLowest genuine · Aquarium Spare Parts · checked 30 Oct
CompatibleCompatible option
See seller
No compatible seller tracked yetNo compatible seller tracked yet
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 price · $3.94 each · 2-pack $7.88
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AUD, before delivery. Each price shows when it was checked.
Opens Aquarium Spare Parts in a new tab. Their page is the source of truth for price, delivery and returns.
Not due yet?
Get a nudge when your carbon filter is due — it's every month. One email two weeks before, no newsletter. Manage or stop it anytime.
How to change the carbon filter in your Fluval Nano Aquarium Filter
Watch the guide or follow the steps.
No clear video for this part yet. The steps cover it.
- 1Unplug the filter.
- 2Open the filter and take out the old media.
- 3Rinse foam in water from the aquarium.
- 4Fit a new carbon cartridge about every month (Fluval says carbon lasts about a month in an aquarium).
- 5Put the media back, close the filter and plug it in.
Every number this part goes by
- Retail name:
- A-458
- Retail name:
- A458
Sellers list any of these; they are the same part.
About your Fluval Nano Aquarium Filter
Fluval aquarium filter — Nano internal filter. Its carbon filter is the Carbon Cartridge for Nano Aquarium Filter, 2-Pack, part A458, changed every month.
Where the model number is: The model is on the filter's lid, motor head or a label on its side (Fluval 307, Eheim Classic 2215). For a tank with a built-in filter, use the tank's name.
Fits this Fluval model
Fluval1 model
Common questions
- Which carbon filter fits the Fluval Nano Aquarium Filter?
- The Fluval Nano Aquarium Filter takes the Fluval Carbon Cartridge for Nano Aquarium Filter, 2-Pack (part A458).
- How often should I replace the carbon filter in my Fluval Nano Aquarium Filter?
- Every month. It works less well as the filter fills up, so it's worth doing on time.
- Where can I buy the A458 in Australia?
- We track 1 Australian seller for the A458; the lowest listed price when we last checked was A$3.94 at Aquarium Spare Parts. Prices are re-checked daily and dated on this page.
- How do I fit the A458 in a Fluval Nano Aquarium Filter?
- 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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