FitMatch

The Aqua One AquaStart 340 takes the Aqua One Carbon Cartridge 69c (25069C) for AquaStart 340 as its carbon filter; replace it every 2 months; Australian sellers list it from A$7.94 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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25069C

Takes the 25069C

Carbon filter · every 2 months · check the code on your old filter.

Other Aqua One aquarium filters and their replacement media

The 25069C fits the AquaStart 340 only. These Aqua One models take a different carbon filter:

Genuine

$7.94 each

2-pack $15.88

Aquarium Spare Parts · 7 Nov

Compatible

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

Lowest price · $7.94 each · 2-pack $15.88

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Aquarium Spare PartsGenuine · checked 7 Nov$7.94 each2-pack $15.88Open
Open cheapest seller · $7.94 each · 2-pack $15.88

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Not due yet?

Get a nudge when your carbon filter is due — it's every 2 months. One email two weeks before, no newsletter. Manage or stop it anytime.

Also saves the model to a FitMatch account under this address; the email signs you in, no password.

How to change the carbon filter in your Aqua One AquaStart 340

Watch the guide or follow the steps.

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

  1. 1Unplug the filter, or the tank's filter pump and any other equipment in the tank, as Aqua One advises.
  2. 2Open the filter and take out the carbon cartridge.
  3. 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.
  4. 4Fit a new carbon cartridge every 6–8 weeks. Rinse new carbon first; Aqua One allows tap water for new carbon, never for sponges.
  5. 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:
25069C
Retail name:
69C

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

About your AquaStart 340

Aqua One aquarium filter — AquaStart aquarium. Its carbon filter is the Carbon Cartridge 69c (25069C) for AquaStart 340, part 25069C, changed 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 this Aqua One model

Aqua One1 model

Common questions
Which carbon filter fits the Aqua One AquaStart 340?
The Aqua One AquaStart 340 takes the Aqua One Carbon Cartridge 69c (25069C) for AquaStart 340.
How often should I replace the carbon filter in my Aqua One AquaStart 340?
Every 2 months. It works less well as the filter fills up, so it's worth doing on time.
Where can I buy the 25069C in Australia?
We track 1 Australian seller for the 25069C; the lowest listed price when we last checked was A$7.94 at Aquarium Spare Parts. Prices are re-checked daily and dated on this page.
How do I fit the 25069C in an Aqua One AquaStart 340?
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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