31 dBmodel 400 31.5 dBmodels 700 and 1000 32 dBmodel 1500 The motor runs underwater and rubber pads dampen vibrations against the glass.

Unplug the filter. Lift the lid and remove the basket or the cartridges. Rinse the cartridges in a bucket of water from the aquarium. Put them back and plug in again: the filter primes itself.

Small black cascade filter with its straight intake tube, model for nano aquariums

Medium-sized black cascade filter with telescopic intake tube and strainer

Black cascade filter with an extended reservoir for 130 to 200 litre aquariums

Large black cascade filter, the longest in the range, supplied with its intake tube

Parts of the cascade filter laid out: housing, pump and cable, tubes, strainer, basket and cartridges

Cascade filter basket taken out of its housing, next to four filter cartridges

Cross-section of the reservoir filled with white wadding cartridges lined up in their basket

Cross-section of the canister filled with layers of loose media: blue foam, ceramic rings and wool

Cascade filter for aquariums Aquael FZN PRO

Name: Cascade filter for aquariums Aquael FZN PRO
Brand: Aquael
SKU: EL132051
Availability: InStock

$40.00

$13.33 × 3 with no fees Klarna.

This cascade filter hangs on the rim of the aquarium and returns the filtered water as a sheet. Four sizes cover tanks from 10 to 300 litres, with automatic priming and cartridges that change in a single movement.

Ref. EL132051·Aquarium filter

Modèle : 320 l/h, bac jusqu'à 75 l

320 L/h, bac jusqu'à 75 L

700 L/h, bac jusqu'à 130 L

900 L/h, bac jusqu'à 200 L

1 370 L/h, bac jusqu'à 300 L

Customer support 7 days a week by email

Delivery within 2 to 15 business days

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The summary

What it is: a waterfall filter that hangs on the rim of the aquarium and returns the filtered water in a sheet.
How to choose: 320 L/h up to 75 L, 700 L/h up to 130 L, 900 L/h up to 200 L, 1,370 L/h up to 300 L.
The media: one to six cartridges depending on the model, or your own loose media.
Noise: 31 to 32 dB, thanks to the motor placed underwater.

Hang-on filter for the edge of the tank, quiet, from 320 to 1,370 L/h

A waterfall filter hangs on the back rim of the aquarium, on the outside of the glass. Its pump, placed in the water, lifts the tank water into a reservoir filled with filter media, and the clean water falls back into the aquarium through a wide spout, in a sheet that ripples the surface. The FZN PRO applies this principle in four sizes, from 320 to 1,370 L/h, for tanks of 10 to 300 litres. You can install it in a few minutes, with no pipe or cabinet, and keep the inside of the tank free.

Automatic priming

The filter fills itself at start-up and restarts on its own after a power cut.

Flow control knob

A large rotary knob adjusts the flow, from a gentle trickle to full power.

Motor in the water

The pump runs submerged, which muffles its noise: 31 to 32 dB depending on the model.

Adjustable tilt

A vertical adjustment sets the housing exactly level on the edge of the glass.

Choose the size according to the volume of your tank. The FZN PRO 400, the most compact, is designed for small tanks of 10 to 75 litres. The 700 suits aquariums of 75 to 130 litres, the 1000 from 130 to 200 litres and the 1500 from 200 to 300 litres. These three larger models add the cartridge basket, the telescopic intake tube and the option of a skimmer.

🧽 Cartridges or loose media

The canister takes filter cartridges that lift out in one movement together with their basket, ready to be rinsed over a bucket. Their number follows the size of the filter: one on the 400, two on the 700, four on the 1000 and six on the 1500. Three fillings are available: STANDARD in filter wool for mechanical filtration, CARBOMAX with activated carbon against odours and yellowed water, PHOSMAX against phosphates, which encourage algae. You can also empty the canister and layer your own loose media in it, sponge at the bottom, ceramic in the middle, filter wool on top, or combine the two.

A layer of media balls for the bacteria

In the reservoir of an FZN PRO 1000 or 1500, a layer of EHEIM SUBSTRATpro biological filtration beads beneath the filter wool multiplies the surface area where bacteria live. The filter then copes better with the waste of a well-stocked tank, and the wool remains the only part that needs changing often.

🌱 In aquaponics

On an aquarium topped with a small grow bed, the FZN PRO acts as the biological filter. The bacteria living in its media convert the fish's ammonia into nitrite and then into nitrate, the form of nitrogen that your herbs and lettuces absorb, as explained in the article on the nitrogen cycle. The cascading water also stirs the surface and promotes gas exchange, which benefits fish and bacteria alike. Reserve the CARBOMAX cartridge for removing a medication once treatment is over: the rest of the time, a simple filter wool and biological media are enough in a planted tank.

📦 What's in the box

You receive the complete FZN PRO filter, ready to plug in, with its pump, cable and suction tube with strainer. The canister arrives filled with its filter cartridges, from one to six depending on the model, and the 700, 1000 and 1500 models add the basket that holds them and the telescopic suction tube. To start up a new tank, a dose of EasyStart starter bacteria speeds up the colonisation of the filter media.

Technical specifications

The four models

Flow rate: 320, 700, 900 or 1,370 L/hModels 400, 700, 1000 and 1500, adjustable by dial.
Recommended tank: Up to 75, 130, 200 or 300 LFrom 10, 75, 130 or 200 L depending on the model.
Power consumption: 4.5, 6.2, 7.1 or 13 W
Cartridges: 1, 2, 4 or 6

Use and dimensions

Length: 12.7 to 32.7 cmHeight of 28.4 cm, except the 400, which measures 16 cm.
Noise level: 31 to 32 dB
Priming: Automatic, at start-upThe filter restarts by itself after a power cut.
Surface skimmer: Optional, cordlessOn the 700, 1000 and 1500 models.

In the box

1 FZN PRO cascade filter in the chosen model, with integrated pump and cable
1 intake tube with its strainer
The model's filter cartridges: 1, 2, 4 or 6
1 cartridge basket and 1 telescopic intake tube with models 700, 1000 and 1500

Flow rates, tank volumes, power ratings, noise levels, dimensions and number of cartridges recorded on 11/10/2026 from the manufacturer's data sheet.

Which FZN PRO for your tank?

The same cascade filter in four sizes. Flow rate, number of cartridges and equipment all increase together.

400, 700, 1000 or 1500? Two answers about the volume of your aquarium, and the table highlights the filter that suits it.

	FZN PRO 400Your choice	Recommended FZN PRO 700Your choice	FZN PRO 1000Your choice	FZN PRO 1500Your choice
The tank
Recommended tank, up to (L)	75 L	130 L	200 L	300 L
Recommended tank, from (L)	10 L	75 L	130 L	200 L
The filter
Flow rate (L/h)	320 L/h	700 L/h	900 L/h	1370 L/h
Power consumption (W)	4,5 W	6,2 W	7,1 W	13 W
Cartridges	1	2	4	6
Noise level (dB)	31 dB	31,5 dB	31,5 dB	32 dB
Basket and telescopic tube	No	Yes	Yes	Yes
Price	$40.00	$77.00	$91.00	$99.00

FZN PRO 400

The tank

Recommended tank, up to (L)75 L

Recommended tank, from (L)10 L

The filter

Flow rate (L/h)320 L/h

Power consumption (W)4,5 W

Cartridges1

Noise level (dB)31 dB

Basket and telescopic tubeNo

FZN PRO 700Recommended

The tank

Recommended tank, up to (L)130 L

Recommended tank, from (L)75 L

The filter

Flow rate (L/h)700 L/h

Power consumption (W)6,2 W

Cartridges2

Noise level (dB)31,5 dB

Basket and telescopic tubeYes

FZN PRO 1000

The tank

Recommended tank, up to (L)200 L

Recommended tank, from (L)130 L

The filter

Flow rate (L/h)900 L/h

Power consumption (W)7,1 W

Cartridges4

Noise level (dB)31,5 dB

Basket and telescopic tubeYes

FZN PRO 1500

The tank

Recommended tank, up to (L)300 L

Recommended tank, from (L)200 L

The filter

Flow rate (L/h)1370 L/h

Power consumption (W)13 W

Cartridges6

Noise level (dB)32 dB

Basket and telescopic tubeYes

Flow rates, volumes, power ratings, noise levels and number of cartridges recorded on 11/10/2026 from the manufacturer's technical data sheet.

Estimate your
delivery time

The filter is shipped in its original box, by Colissimo or Chronopost to your door, as you choose during checkout. The exact shipping cost is shown in your basket.

Frequently asked questions

8 questions

6 key questions, 8 in the detailed view

Which model should I choose for my aquarium?

Model	Tank	Flow rate
400	10 to 75 L	320 L/h
700	75 to 130 L	700 L/h
1000	130 to 200 L	900 L/h
1500	200 to 300 L	1,370 L/h

Between two sizes, choose the larger one and reduce the flow with the dial if the current bothers the fish.

Does the filter need priming?

Which cartridges should you use?

Can it be used as a filter in aquaponics?

Is it noisy?

How to clean it?

Does the 400 model have the same features?

Can a surface skimmer be added?

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Cascade filter for aquariums Aquael FZN PRO

The summary