---
product_id: 48127516
title: "U4 Internal Filter, 240 Litre"
brand: "fluval"
price: "973.77 DT"
currency: TND
in_stock: true
reviews_count: 13
category: "Fluval"
url: https://www.desertcart.tn/products/48127516-u4-internal-filter-240-litre
store_origin: TN
region: Tunisia
---

# Adjustable flow control Top-access for easy maintenance 3-stage filtration system U4 Internal Filter, 240 Litre

**Brand:** fluval
**Price:** 973.77 DT
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your aquarium game with flawless filtration and effortless care!

## Quick Answers

- **What is this?** U4 Internal Filter, 240 Litre by fluval
- **How much does it cost?** 973.77 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/48127516-u4-internal-filter-240-litre)

## Best For

- fluval enthusiasts

## Why This Product

- Trusted fluval brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Maintenance:** Top-access design means quick, hassle-free filter cleaning without tank disruption.
- • **Sleek & Discreet Design:** Modern black finish blends seamlessly into your aquarium setup, elevating your tank’s aesthetic.
- • **Whisper-Quiet Operation:** Super silent performance keeps your space peaceful while maintaining optimal water quality.
- • **Tailored Flow for Your Tank:** Adjustable flow control lets you customize water movement to suit your aquatic environment perfectly.
- • **Crystal Clear Water, Every Time:** Advanced 3-stage filtration traps debris, toxins, and impurities for pristine aquarium clarity.

## Overview

The FLUVAL U4 Internal Filter is a powerful 240-litre capacity aquarium filter featuring a 3-stage filtration system, adjustable flow control, and a top-access design for easy maintenance. Its quiet operation and sleek black finish make it an ideal choice for medium-sized tanks, ensuring crystal-clear water and a healthy aquatic environment with minimal hassle.

## Description

Free delivery and returns on eligible orders. Buy FLUVAL U4 Internal Filter, 240 Litre at desertcart UK.

Review: Must have ! - Best in tank filter I’ve had. Bought as original tank filter went down in my 130l , the pros of this filter are - -super quite , hardly any noise -smart looking / blends in / fits nicely -3 different spray modes (top , bottom or middle for gentle flow) So easy to use / setup and for maintenance The water is really really clear with the active carbon in the filter , it comes with ceramic media too which is a bonus Overall really good filter , highly recommend this in tank instead of external canister
Review: Good filters, quiet in operation - Brought to replace a failing one. I find these last a few years and then start failing. I like this filter, it is quiet and does the job well. Needs cleaning about every 2 weeks in my 100L tank.

## Features

- Top Access - for easy maintenance
- Adjustable flow control
- 3 Stage Filtration

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001XRXY1G |
| Allergen Information | Nut Free |
| Batteries Included | No |
| Batteries required | No |
| Best Sellers Rank | 5,279 in Pet Supplies ( See Top 100 in Pet Supplies ) 18 in Aquarium Filters |
| Breed Recommendation | Medium |
| Colour | Black |
| Customer Reviews | 4.2 4.2 out of 5 stars (7,881) |
| Date First Available | 16 Nov. 2009 |
| Item Form | Power |
| Item Weight | 1.12 kg |
| Item model number | A480A1 |
| Material Composition | 100% Mixed |
| Number of Items | 1 |
| Pet Life Stage | All Life Stages |
| Pet Type | Fish |
| Product Dimensions | 11.68 x 13.21 x 35.56 cm; 1.12 kg |
| Quantity | 1 |
| Size | U4 (240 Litre) |
| Specific Uses | Indoor |
| Voltage | 230 Volts |

## Product Details

- **Brand:** Fluval
- **Capacity:** 240 litres
- **Included components:** Filter
- **Installation type:** Freestanding
- **Item weight:** 1.12 Kilograms
- **Material:** Metal
- **Maximum flow rate:** 1000 Litres Per Hour
- **Model name:** Fluval A Filtro Interno U
- **Power source:** Battery Powered
- **Purification method:** Biological filtration, activated carbon

## Images

![U4 Internal Filter, 240 Litre - Image 1](https://m.media-amazon.com/images/I/41T6Zfskp5L.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Does the whole unit go under water? No spray bar to make a noise? All the aeration underwater bubbles? My filter at the moment very noisy!**
A: its very quiet, just a small hum if you get near it. It has 3 settings, one makes bubbles, the other ones are silent, you dont have to have the bubbles if the unit is under water, mine is just above the surface, i dont like to trail the wire in the water but some people do and the unit can sit in the bottom of the tank, it is large but a few plants will cover it, hope this helps

**Q: Hi does the filer come ready to use or do I have to buy the filters and foam seperately?**
A: Hi Leigh.It comes with the filters and biomax filter media :-) I get my refills from Amazon seller The Aquahut for £11.59 for a 2 pack foam pad, 2 pack cartridge pack and 170g box of biomax. Good value and very reliable seller. Have used them ever since I purchased my Fluval U2. Happy to help :-)

**Q: I have lost the grey stopper that regulate the slow from the top filter. Is it possible to purchase these separately please?**
A: You can use a blob of bluetac and vary the air flow like that.

**Q: Will this filter work if I use it horizontally on its side, rather than vertically? I want to use it in my turtle tank which has a low water level**
A: I can’t see it being a problem. How deep is your water though? This is enough filtration for a 110l tank so if you’ve only got a bit of water in the bottom a sponge filter may be a better option?

## Customer Reviews

### ⭐⭐⭐⭐⭐ Must have !
*by T***E on 29 December 2025*

Best in tank filter I’ve had. Bought as original tank filter went down in my 130l , the pros of this filter are - -super quite , hardly any noise -smart looking / blends in / fits nicely -3 different spray modes (top , bottom or middle for gentle flow) So easy to use / setup and for maintenance The water is really really clear with the active carbon in the filter , it comes with ceramic media too which is a bonus Overall really good filter , highly recommend this in tank instead of external canister

### ⭐⭐⭐⭐⭐ Good filters, quiet in operation
*by P***G on 27 December 2025*

Brought to replace a failing one. I find these last a few years and then start failing. I like this filter, it is quiet and does the job well. Needs cleaning about every 2 weeks in my 100L tank.

### ⭐⭐⭐⭐⭐ Amazing filter top marks all round
*by S***Y on 1 July 2025*

We bought this as the filter we had was not doing a great job water was never crystal clear. Bought the u2 and over night the water was clear. The pictures added to this review are from this weekends water change/aqua scaping. The water got super cloudy due moving the sand about. With in a few hour a noticeable difference. This morning the tank was crystal clear. Out water is dark due to new wood tanens being in the water. But the water its self is beautifully clear. Quiet filter and easy to use. It is quite a big filter. We have ours hidden behind some wood. The three settings for bottom middle or top flow is great to have. Easily removed for filter changes. I cant recommend high enough. You can feel the quality. If you order this get a eu to uk convertor plug as mine came as an eu plug and not a uk one. Wasnt an expensive add. Even that doesn’t take away for how great the filter is

## Frequently Bought Together

- Fluval U4 Underwater Filter, Freshwater and Saltwater Aquarium Filter, A480,Black
- Fluval U4 Bio-Foam Pad, Replacement Underwater Aquarium Filter Media, A488
- Fluval U Underwater Filter BioMax

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.tn/products/48127516-u4-internal-filter-240-litre](https://www.desertcart.tn/products/48127516-u4-internal-filter-240-litre)

---

*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-03-24*