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400L/H Internal Filter for Aquariums and Fish Tanks - 1pcs
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400L/H Internal Filter for Aquariums and Fish Tanks

Home improvementInstallation Basic
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Estimated delivery in 3 days

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£29.40Dimensions: 235 x 95 x 80 mmWeight: 0.700 kg
Total price£29.40
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£29.40

400L/H Internal Filter for Aquariums and Fish Tanks

1pcs

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Fit, prep and delivery

Estimated delivery in 3 days with tracked fulfilment.

Best for

  • Simplify your aquarium setup by covering multiple maintenance tasks with one unit.
  • Keep water moving and oxygenated without running several separate devices.
  • Enjoy quieter operation that won't dominate the room the tank is in.

What's included

  • 1 x 400L/H Internal Submersible Filter

Availability and fulfilment

  • Available stock: 50 units
  • Ships to United Kingdom
  • Estimated delivery in 3 days
  • Package weight: 0.7 kg

400L/H Internal Filter for Aquariums and Fish Tanks

A 400L/H internal submersible filter designed to handle several jobs at once inside a fish tank, aquarium, or similar water feature. It combines filtration, oxygenation, algae removal, UV sterilisation, and a waterfall effect in one unit, making it a flexible option for various setups including hydroponic systems. The motor and pump are built to run quietly, with a self-priming feature intended to reduce the risk of leaks, so it can operate in the background without disturbing the environment around the tank. Submersible by design, it sits inside the water rather than requiring external plumbing, keeping installation straightforward.

  • 400L/H Flow Rate: A flow rating suited to smaller to mid-sized tanks and water features.
  • 5-in-1 Function: Combines filtration, oxygenation, algae removal, UV sterilisation and waterfall effect.
  • Ultra-Quiet Motor: Designed to run with minimal noise compared with some external filters.
  • Self-Priming Feature: Helps reduce the risk of leaks during operation.
  • Submersible Design: Sits fully inside the water, simplifying setup versus external units.

400L/H Aquarium Internal Submersible Filter

This internal filter is rated at 400L/H and is built to bring several functions together in a single submersible unit, suited to fish tanks, aquariums, waterfalls, and hydroponic systems.

Multiple Functions in One Unit

  • Filtration: Helps keep tank water clearer as part of routine maintenance.
  • Oxygenation: Supports water movement and aeration inside the tank.
  • Algae Removal: Contributes to reducing algae build-up over time.
  • UV Sterilisation: Adds a UV sterilisation function alongside standard filtration.
  • Waterfall Effect: Can create a waterfall-style water movement for aquariums or ponds.

Quiet, Self-Priming Design

The filter uses an ultra-quiet motor and internal pump, aimed at reducing noise compared with some external filters. Its self-priming feature is designed to help prevent leaks, supporting steady, low-maintenance operation once installed.

Key benefits

  • 400L/H Flow Rate: A flow rating suited to smaller to mid-sized tanks and water features.
  • 5-in-1 Function: Combines filtration, oxygenation, algae removal, UV sterilisation and waterfall effect.
  • Ultra-Quiet Motor: Designed to run with minimal noise compared with some external filters.
  • Self-Priming Feature: Helps reduce the risk of leaks during operation.
  • Submersible Design: Sits fully inside the water, simplifying setup versus external units.
  • 400L/H flow rate
  • 5-in-1 water function
  • Ultra-quiet motor
  • Self-priming, leak-resistant
  • Submersible internal design

Key specifications

Essential details for your purchase

Size, materials and availability at a glance

Dimensions
95 x 80 x 235
Package weight
0.7 kg
Estimated delivery time
3 days
Materials
Others
Packaging
Plastic bags and Carton
Ships from
United Kingdom
Global inventory available
50 units

Details to help you decide

Description and experienceShow

Keeping an aquarium running smoothly usually means juggling several pieces of equipment, so a filter that combines multiple functions in one unit can simplify the setup considerably. This 400L/H internal submersible filter is designed to handle filtration, oxygenation, algae removal, UV sterilisation, and a waterfall effect all from a single submerged unit, making it suited to fish tanks, aquariums, garden waterfalls, and hydroponic systems alike. Because it sits inside the water rather than needing external plumbing, installation is generally more straightforward than with dedicated external filters. The internal pump and motor are built for ultra-quiet operation, which matters if the tank sits somewhere you spend time relaxing, and a self-priming feature is included to help reduce the risk of leaks during running. Whether you are setting up a new tank or looking to replace ageing equipment, this filter offers a compact way to cover several maintenance tasks without needing to run multiple separate devices.

Guarantees, usage and supportShow

Technical review and performance

The unit is a submersible internal filter rated at 400L/H, combining a pump-driven filtration stage with oxygenation, algae removal, UV sterilisation, and an optional waterfall outlet in one housing. It uses a self-priming internal pump design intended to reduce noise and lower the risk of leaks compared with some external filter setups. No specific material composition or dimensions are provided by the supplier beyond its functional description.

Expert take

This filter earns its place by combining several jobs — filtration, oxygenation, algae control, UV sterilisation, and a waterfall option — into one relatively compact submersible unit, which is a genuinely useful shortcut for anyone not wanting to run a shelf full of separate aquarium equipment. The emphasis on quiet running and a self-priming design suggests it's aimed at everyday fish-keepers rather than large-scale or commercial setups, and the 400L/H rating points to smaller and mid-sized tanks as the sweet spot rather than very large aquariums. It should suit hobbyists setting up a new tank or replacing tired equipment, as well as anyone experimenting with small garden water features or hydroponic systems where a single flexible pump is handy. As with any aquarium equipment, match the flow rate to your tank's actual volume and stocking level before relying on it as your sole filtration source, and keep an eye on it during the first few days of use to confirm it's behaving as expected in your specific setup.

Quick guides and tipsShow

Highlighted features

  • 400L/H flow rate
  • 5-in-1 water function
  • Ultra-quiet motor
  • Self-priming, leak-resistant
  • Submersible internal design

Key benefits

  • Simplify your aquarium setup by covering multiple maintenance tasks with one unit.
  • Keep water moving and oxygenated without running several separate devices.
  • Enjoy quieter operation that won't dominate the room the tank is in.
  • Reduce ongoing hassle with a self-priming design aimed at minimising leaks.

Usage recommendations

  • Match the 400L/H flow rate to your tank's volume rather than assuming it fits any size.
  • Position the filter to maximise water circulation across the tank for more even filtration.
  • Allow the filter to run continuously once installed, as intermittent use can reduce its effectiveness.

What's included

  • 1 x 400L/H Internal Submersible Filter

Care recommendations

  • Clean the filter media and impeller regularly to keep flow rate and filtration performance consistent.
  • Check the self-priming mechanism periodically to confirm it continues to operate without leaking.
  • Rinse removable components in tank water rather than tap water where possible to protect beneficial bacteria.

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Frequently asked questions

What size tank is this filter suitable for?
It is rated at 400L/H flow, which generally suits smaller to mid-sized aquariums; match the rating against your tank's volume and stocking level before purchasing.
How is it installed?
It is a submersible internal filter, so it sits fully inside the water rather than requiring external plumbing, which keeps setup relatively simple.
Is it noisy when running?
It is built with an ultra-quiet motor and internal pump design, intended to run more quietly than many external filters.
Does it do more than basic filtration?
Yes, alongside filtration it offers oxygenation, algae removal, UV sterilisation, and a waterfall effect option in the same unit.
Can it be used outside of a standard fish tank?
The manufacturer describes it as suitable for fish tanks, aquariums, waterfalls, and hydroponic systems, so it has some flexibility beyond a standard tank setup.

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