Delivery throughout the EU

AQUAEL FZN PRO 400 – Ultra-Silent Hang-On Filter for Aquariums up to 75 L

Trusted by 500+ aquascapers

€26,48
  • Near-silent at roughly 31 dB
  • Restarts itself after a power cut
  • No priming, no siphon fiddling
  • Flow adjusts with a knob on top
  • Takes cartridges or your own media

Hangs on the back of tanks from 10 to 75 litres and gets on with the job at around 31 dB — quiet enough for a bedroom. The submerged motor starts without priming and picks up on its own after a power cut.

Fast delivery (1–5 days EU)

Carefully packed and protected

Tips from real aquascapers

Description

The Aquael FZN PRO 400 is a compact hang-on (cascade) filter for freshwater and marine aquariums up to 75 litres. Its fully submerged motor starts instantly without priming and restarts automatically after power outages — no manual intervention required. At just ~31 dB, it is one of the quietest hang-on filters available, making it ideal for bedrooms, living rooms, and office setups. The filter is made entirely from non-corrosive components, suitable for both fresh and saltwater.

The media chamber accepts both ready-made Aquael cartridges (Standard, Carbomax, Phosmax) and loose filter media — giving the flexibility to run a simple plug-and-play setup or a fully customized filtration arrangement.

Key features

  • Submerged motor — instant start, no priming needed, auto-restart after power cut
  • ~31 dB noise level — near-silent operation
  • Adjustable flow rate via top control knob
  • Flexible media chamber — use Aquael cartridges or custom bulk media
  • Flush outlet — smooth water flow without splashing
  • Rubber isolation pads — vibration dampening on glass contact points
  • Non-corrosive materials — safe for freshwater and marine
  • 2-year warranty

Technical specifications

  • Flow rate: 320 L/h
  • Power consumption: 4.5 W
  • Noise level: ~31 dB
  • Tank size: 10–75 L
  • Dimensions (L×W×H): 12.7 × 12.8 × 16 cm
  • Filter baskets: 1
  • Suitable for: Freshwater and marine

Pair with

  • Aquael Advanced Soil — substrate for planted tanks and shrimp
  • Aquael Ultra Heater — precise temperature control

  • Professional support

    Expert help when you need it

  • Delivery throughout the EU

    Delivery to all EU countries

  • Secure payment

    Fast and secure payment options

  • Easy returns

    Лесно връщане и замяна
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FAQ

What makes Aquarium Boutique different from mass-market stores?

We don't sell everything — we sell only carefully selected products, personally tested. Every item is chosen with a clear purpose: to work well and last long. You don't need to guess about quality — we've already done that for you.

Do you ship to my country?

Yes, we ship across all of Europe. For Bulgaria we work with BOX NOW and Speedy — fast and reliable home or locker delivery. For other EU countries we use international courier services.

How quickly will I receive my order?

For orders within Bulgaria, we typically deliver within 1–3 business days. For other EU countries — usually 3–7 business days depending on location.

Can I return a product if I'm not satisfied?

Yes. If something doesn't meet your expectations — contact us. We have a clear and fair return policy. Your satisfaction matters to us and we will find a solution.

Do you offer advice on product selection?

Absolutely. Our team keeps aquariums and knows the products personally. Write to us — we'll help you choose the right solution for your tank, budget and experience level.

Are your products tested and approved?

Yes. Every product in our store has gone through our personal selection and testing process . We only work with trusted brands and don't list products we don't believe in.

What payment methods do you accept?

We accept all major payment methods — credit and debit cards, PayPal, and cash on delivery for Bulgaria. All payments are secure and encrypted.

How can I track my order?

After your order ships, you'll receive an email with a tracking link. You can follow the status in real time directly through the courier's website.