FitMatch

The Aqua One EcoStyle 37 takes the Aqua One Sponge 104s (25104S) for EcoStyle 32 and EcoStyle 37 as its filter media; Australian sellers list it from A$3.94 each as of 7 November 2026. Fitment confirmed against the manufacturer's compatibility list.

Your aquarium filter

Aquarium filter

Confirmed against Aqua One's list

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25104S

Takes the 25104S

Filter media · check the code on your old filter.

Other Aqua One aquarium filters that take the 25104S

Genuine

$3.94 each

2-pack $7.88

Aquarium Spare Parts · 7 Nov

Compatible

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Genuine: made by Aqua One. Compatible: another brand.

Lowest price · $3.94 each · 2-pack $7.88

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This aquarium filter also takes a carbon filter

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

Aquarium Spare PartsGenuine · checked 7 Nov$3.94 each2-pack $7.88Open
Open cheapest seller · $3.94 each · 2-pack $7.88

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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 filter media in your Aqua One EcoStyle 37

Watch the guide or follow the steps.

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

  1. 1Turn the power head off and unplug the aquarium's equipment.
  2. 2Remove the lid from the filter unit and lift the elbow and spray bar off the top of the power head.
  3. 3Take out the carbon cartridge and the black filter sponge. Rinse the sponge in a little aquarium water in a bucket, then throw that water away rather than adding it back to the tank.
  4. 4Put the sponge back, or fit a new one once the old one blocks up or breaks down.
  5. 5Refit the spray bar with its holes pointing down onto the carbon cartridge, make sure the tank is full, turn the power head on and check that water flows from the spray bar. Close the lid.
Every number this part goes by
Retail name:
104S
Retail name:
25104S

Sellers list any of these; they are the same part.

About your EcoStyle 37

Aqua One aquarium filter — EcoStyle aquarium (discontinued). Its filter media is the Sponge 104s (25104S) for EcoStyle 32 and EcoStyle 37, part 25104S.

Also in this aquarium filter: Aqua One Carbon Cartridge 104c (25104C) for EcoStyle 32 and EcoStyle 37 (every 2 months).

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 these 2 Aqua One models

Aqua One2 models

Common questions
Which filter media fits the Aqua One EcoStyle 37?
The Aqua One EcoStyle 37 takes the Aqua One Sponge 104s (25104S) for EcoStyle 32 and EcoStyle 37.
Where can I buy the 25104S in Australia?
We track 1 Australian seller for the 25104S; 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 25104S in an Aqua One EcoStyle 37?
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 EcoStyle 37 match? . Reports go to a person, not a bot.