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.

Aquarium filter media

Aqua One Sponge 35ppi 40s (25040S) for Aquis 1000 and Aquis 1200

25040S

Fits 2 models

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GenuineGenuine Aqua One

$14.44 each

2-pack $28.88

Aquarium Spare Parts · 29 OctLowest genuine · Aquarium Spare Parts · checked 29 Oct

CompatibleCompatible option

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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 · $14.44 each · 2-pack $28.88

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Open Aquarium Spare Parts · $14.44 each · 2-pack $28.88

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AUD, before delivery. Each price shows when it was checked.

Genuine Aqua One

1 seller

Aquarium Spare PartsGenuine · checked 29 OctGenuine part · Lowest genuinechecked 29 Oct$14.44 each2-pack $28.88OpenGo to seller

Open cheapest seller · $14.44 each · 2-pack $28.88

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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 25040S aquarium filter media

Watch the guide or follow the steps.

No clear video for this part yet. The steps cover it.

1Turn the canister filter off at the power point and unplug it. Close the taps or flow valve and disconnect the tap connector from the head unit (Nautilus: lift the locking lever).
2Fill a bucket with water from your aquarium. Release the clips, lift off the head unit and take the media baskets out of the canister.
3Take out the sponges and the white wool. Dunk the baskets of biological media a few times in the bucket of aquarium water: Aqua One says this keeps the chlorine in tap water from killing the good bacteria on it.
4Rinse the sponges in the bucket of aquarium water. Fit a new fine sponge (35ppi) once the old one clogs and water no longer passes through it easily.
5Put the media back in the same baskets and order, refit the baskets and head unit, then prime and restart the filter as its manual describes.

Every number this part goes by25040S · 40S

Retail name:: 25040S
Retail name:: 40S

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.

Your appliance model

Fits these 2 Aqua One modelsAquis 1000, Aquis 1200

Aqua One2 models

Fine 35ppi sponge sold on its own (also in the media set).

Common questionsWhat does the 25040S fit? · Where can I buy the 25040S in Australia? · How do I fit the 25040S?

What does the 25040S fit?: The Aqua One Sponge 35ppi 40s (25040S) for Aquis 1000 and Aquis 1200 fits the Aqua One Aquis 1000 and Aquis 1200.
Where can I buy the 25040S in Australia?: We track 1 Australian seller for the 25040S; the lowest listed price when we last checked was A$14.44 at Aquarium Spare Parts. Prices are re-checked daily and dated on this page.
How do I fit the 25040S?: 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.

Something looks wrong with the 25040S match? . Reports go to a person, not a bot.