The Aqua One UFO 550 takes the Aqua One Sponge 59s (25059S) for UFO 550 as its filter media; Australian sellers list it from A$11.94 each as of 30 October 2026. Fitment confirmed against the manufacturer's compatibility list.
Your aquarium filter
Aqua One UFO 550
Aquarium filter
Confirmed against Aqua One's listConfirmed against Aqua One's own compatibility list
Not yours? Change
Takes the 25059S filter media
Sponge 59s (25059S) for UFO 550 · 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 25059S
Filter media · check the code on your old filter.
Other Aqua One aquarium filters and their replacement media
The 25059S fits the UFO 550 only. These Aqua One models take a different filter media:
GenuineGenuine Aqua One
$11.94 each
2-pack $23.88
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 · $11.94 each · 2-pack $23.88
Aquarium Spare Parts. Every seller we track is listed below. Some links earn us a commission. Some seller links earn us a commission, at no extra cost to you.
This aquarium filter also takes a fine pad
- Aqua One Wool 59w (25059W) for UFO 550Open Aquarium Spare Parts$9.44 each · 2-pack $18.88
Separate from the filter media. Reduces micro-particles (fine wool, mechanical).
Compare 1 seller
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.
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 UFO 550
Watch the guide or follow the steps.
No clear video for this part yet. The steps cover it.
- 1Unplug the filter, or the tank's filter pump and any other equipment in the tank, as Aqua One advises.
- 2Open the filter and take out the sponge.
- 3Rinse sponges gently in a bucket of water taken from the aquarium, never under the tap: Aqua One says tap water kills the filter's beneficial bacteria.
- 4Put the sponge back, or fit a new one once the old one blocks up or breaks down.
- 5Put the media back as it was. Plug the filter back in and check that water flows.
Every number this part goes by
- Retail name:
- 25059S
- Retail name:
- 59S
Sellers list any of these; they are the same part.
About your Aqua One UFO 550
Aqua One aquarium filter — UFO aquarium (discontinued). Its filter media is the Sponge 59s (25059S) for UFO 550, part 25059S.
Also in this aquarium filter: Aqua One Wool 59w (25059W) for UFO 550.
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 UFO 550?
- The Aqua One UFO 550 takes the Aqua One Sponge 59s (25059S) for UFO 550.
- Where can I buy the 25059S in Australia?
- We track 1 Australian seller for the 25059S; the lowest listed price when we last checked was A$11.94 at Aquarium Spare Parts. Prices are re-checked daily and dated on this page.
- How do I fit the 25059S in an Aqua One UFO 550?
- 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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