FitMatch

The Fluval AquaClear 50 takes the Fluval BIOMAX for AC50 Power Filter, 80 g (part 19662) as its biological media; replace it every 3 months; Australian sellers list it from A$12.88 as of 30 October 2026. Fitment confirmed against the manufacturer's compatibility list.

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Confirmed against Fluval's list

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19662

Takes the 19662

Biological media · every 3 months · check the code on your old filter.

Other Fluval aquarium filters and their replacement media

The 19662 fits the AquaClear 50 only. These Fluval models take a different biological media:

Genuine

$12.88

Aquarium Spare Parts · 30 Oct

Compatible

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Genuine: made by Fluval. Compatible: another brand.

Lowest price · $12.88

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Other parts this aquarium filter takes

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

Aquarium Spare PartsGenuine · checked 30 Oct$12.88Open
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Not due yet?

Get a nudge when your biological media is due — it's every 3 months. One email two weeks before, no newsletter. Manage or stop it anytime.

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How to change the biological media in your Fluval AquaClear 50

Watch the guide or follow the steps.

How To EASILY Clean a Fluval AC Series Filter · Fluval Aquatics (official)
  1. 1Unplug the filter.
  2. 2Lift the media basket out of the filter body.
  3. 3Rinse foam in water from the aquarium; rinse BIOMAX in aquarium water only: Fluval says never to rinse it with tap water.
  4. 4Fit the new BIOMAX in its compartment. Fluval says not to replace all filter media at the same time, so the bacteria on the other media carry on.
  5. 5Put the media basket back in the filter and plug it in.
Every number this part goes by
Retail name:
19662

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

About your AquaClear 50

Fluval aquarium filter — AquaClear power filter (hang-on). Its biological media is the BIOMAX for AC50 Power Filter, 80 g, part 19662, changed every 3 months.

Also in this aquarium filter: Fluval Carbon for AC50 Power Filter, 70 g (every month), Fluval Intake Strainer Sponge for AC20/AC30/AC50 Power Filter.

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 Fluval model

Fluval1 model

Common questions
Which biological media fits the Fluval AquaClear 50?
The Fluval AquaClear 50 takes the Fluval BIOMAX for AC50 Power Filter, 80 g (part 19662).
How often should I replace the biological media in my Fluval AquaClear 50?
Every 3 months. It works less well as the filter fills up, so it's worth doing on time.
Where can I buy the 19662 in Australia?
We track 1 Australian seller for the 19662; the lowest listed price when we last checked was A$12.88 at Aquarium Spare Parts. Prices are re-checked daily and dated on this page.
How do I fit the 19662 in a Fluval AquaClear 50?
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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