FitMatch

The Fluval Evo 52L takes the Fluval BIOMAX for Spec/Evo/Flex/Betta Aquarium Kit, 60 g (part A1378) as its biological media; replace it every 3 months; Australian sellers list it from A$7.88 as of 30 October 2026. Fitment confirmed against the manufacturer's compatibility list.

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Aquarium filter

Confirmed against Fluval's list

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A1378

Takes the A1378

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

Other Fluval aquarium filters that take the A1378

Genuine

$7.88

Aquarium Spare Parts · 30 Oct

Compatible

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No compatible seller tracked yet

Genuine: made by Fluval. Compatible: another brand.

Lowest price · $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 30 Oct$7.88Open
Open cheapest seller · $7.88

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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.

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

How to change the biological media in your Fluval Evo 52L

Watch the guide or follow the steps.

AS EASY AS 1-2-3 | Maintaining a Fluval Flex 2.0 Aquarium · Fluval Aquatics (official)
  1. 1Unplug the pump and lift off the cover of the filter compartment at the back of the tank.
  2. 2Lift the media (foam block, carbon and BIOMAX) out of the filter chambers.
  3. 3Rinse the foam block in water from the aquarium; Fluval says to rinse BIOMAX monthly in aquarium water.
  4. 4Replace the BIOMAX every 3 months, but not at the same time as the foam block: Fluval says not to replace all filter media at the same time.
  5. 5Put the media back in the same chambers, refit the cover and plug the pump back in.
Every number this part goes by
Retail name:
A-1378
Retail name:
A1378

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

About your Evo 52L

Fluval aquarium filter — Evo aquarium kit (rear filter). Its biological media is the BIOMAX for Spec/Evo/Flex/Betta Aquarium Kit, 60 g, part A1378, changed every 3 months.

Also in this aquarium filter: Fluval Carbon for Spec/Evo/Flex Aquarium Kit, 45 g, 3-Pack (every month).

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 9 Fluval models
Common questions
Which biological media fits the Fluval Evo 52L?
The Fluval Evo 52L takes the Fluval BIOMAX for Spec/Evo/Flex/Betta Aquarium Kit, 60 g (part A1378).
How often should I replace the biological media in my Fluval Evo 52L?
Every 3 months. It works less well as the filter fills up, so it's worth doing on time.
Where can I buy the A1378 in Australia?
We track 1 Australian seller for the A1378; the lowest listed price when we last checked was A$7.88 at Aquarium Spare Parts. Prices are re-checked daily and dated on this page.
How do I fit the A1378 in a Fluval Evo 52L?
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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