The Aqua One Maxi 104F takes the Aqua One Sponge 28s (25028S) for Maxi 104F as its filter media; Australian sellers list it from A$6.44 each as of 30 October 2026. Fitment confirmed against the manufacturer's compatibility list.
Your aquarium filter
Aqua One Maxi 104F
Aquarium filter
Confirmed against Aqua One's listConfirmed against Aqua One's own compatibility list
Not yours? Change
Takes the 25028S filter media
Sponge 28s (25028S) for Maxi 104F · check the code printed on your old filter before ordering.
Your aquarium filter
Aquarium filter
Confirmed against Aqua One's listConfirmed against Aqua One's own compatibility list
Takes the 25028S
Filter media · check the code on your old filter.
Other Aqua One aquarium filters and their replacement media
The 25028S fits the Maxi 104F only. These Aqua One models take a different filter media:
GenuineGenuine Aqua One
$6.44 each
2-pack $12.88
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 Aqua One. Compatible: another brand.Genuine is made by Aqua One. Compatible is made by another brand. Check the seller's page for the size and models it fits.
Lowest price · $6.44 each · 2-pack $12.88
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AUD, before delivery. Each price shows when it was checked.
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How long it lasts
Replace it when it clogs, breaks down or no longer holds its shape, Aqua One says; until then rinse it in a bucket of aquarium water each time you clean the filter.
How to change the filter media in your Aqua One Maxi 104F
Watch the guide or follow the steps.
- 1Unplug the filter and any other equipment in the tank, as Aqua One advises and lift it out of the tank.
- 2Pull the filter casing off the motor and take out the sponge, and the carbon cartridge or pouch if your filter has one.
- 3Rinse the sponge gently in a bucket of water taken from the aquarium to flush out solid waste, then throw that water away. Aqua One says never to rinse it under the tap: chlorine kills the filter's bacteria.
- 4Put the sponge back, or fit a new one once the old one blocks up or breaks down.
- 5Put the media back in the casing, refit it to the motor, put the filter back in the tank and plug it in. Check that water flows.
Every number this part goes by
- Retail name:
- 25028S
- Retail name:
- 28S
Sellers list any of these; they are the same part.
About your Aqua One Maxi 104F
Aqua One aquarium filter — Maxi internal filter. Its filter media is the Sponge 28s (25028S) for Maxi 104F, part 25028S.
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 Aqua One model
Aqua One1 model
Common questions
- Which filter media fits the Aqua One Maxi 104F?
- The Aqua One Maxi 104F takes the Aqua One Sponge 28s (25028S) for Maxi 104F.
- Where can I buy the 25028S in Australia?
- We track 1 Australian seller for the 25028S; the lowest listed price when we last checked was A$6.44 at Aquarium Spare Parts. Prices are re-checked daily and dated on this page.
- How do I fit the 25028S in an Aqua One Maxi 104F?
- 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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