---
product_id: 55356969
title: "Fluval U3 Internal Filter Carbon Cartridge"
brand: "fluval"
price: "£7.89"
currency: GBP
in_stock: true
reviews_count: 13
category: "Fluval"
url: https://www.desertcart.co.uk/products/55356969-fluval-u3-internal-filter-carbon-cartridge
store_origin: GB
region: United Kingdom
---

# works in freshwater & marine 2-in-1 chemical filtration easy cartridge replacement Fluval U3 Internal Filter Carbon Cartridge

**Brand:** fluval
**Price:** £7.89
**Availability:** ✅ In Stock

## Summary

> 🌟 Elevate your aquarium’s clarity with Fluval’s precision filtration!

## Quick Answers

- **What is this?** Fluval U3 Internal Filter Carbon Cartridge by fluval
- **How much does it cost?** £7.89 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/55356969-fluval-u3-internal-filter-carbon-cartridge)

## 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

- • **Versatile Aquatic Use:** Perfect for freshwater, marine, and reptile environments
- • **Hassle-Free Maintenance:** Quick and easy cartridge swaps keep your tank thriving
- • **Tailored Fit for Fluval U3:** Custom-designed cartridge ensures seamless compatibility
- • **Dual-Action Filtration Power:** Combines poly and carbon media to trap fine debris and impurities
- • **Crystal Clear Water, Every Time:** Removes odors and toxins for pristine aquarium clarity

## Overview

The Fluval U3 Internal Filter Carbon Cartridge is a genuine, custom-fit replacement designed specifically for the Fluval U3 filter. Featuring a 2-in-1 poly-carbon media, it effectively removes odors, toxins, and fine debris to deliver crystal clear water. Suitable for freshwater, marine, and reptile tanks, this cartridge is easy to replace, ensuring hassle-free maintenance and optimal aquatic health.

## Description

Product Description Fluval U3 Poly-Carb aquarium filter 2 in 1 cartridge removes odours and toxins and creates crystal clear water, genuine Fluval media. Directions Replace cartridge periodically.

Review: as expected - it was a genuine part for the U3 fish filter, works well and good price
Review: Perfect for the Fluval U3 filter - Perfect for the Fluval U3 filter. Arrived on time, well packaged.

## Features

- Provides effective chemical filtration
- Custom fit for the Fluval U3 Filter
- Traps fine debris, improves water clarity and removes impurities
- Easy to replace
- Works in freshwater, marine or reptile environments

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001XRR3E0 |
| Best Sellers Rank | 25,839 in Pet Supplies ( See Top 100 in Pet Supplies ) 341 in Aquarium Filter Accessories |
| Brand | Fluval |
| Brand Name | Fluval |
| Country Of Origin | China |
| Customer Reviews | 4.6 out of 5 stars 1,294 Reviews |
| Global Trade Identification Number | 00015561104913 |
| Item Form | Cartridge |
| Item Type Name | U3 Poly/Carbon Cartridge (2pcs) |
| Item Weight | 0.03 Kilograms |
| Item form | Cartridge |
| Item weight | 0.03 Kilograms |
| Manufacturer | Rolf C Hagen UK Ltd |
| Manufacturer Part Number | A491 |
| Model Number | A491 |
| Pet Type | Fish |
| Target Species | Fish |
| UPC | 015561104913 |
| Unit Count | 1.0 count |
| Unit count | 1.0 count |

## Product Details

- **Brand:** Fluval
- **Item form:** Cartridge
- **Item weight:** 0.03 Kilograms
- **Manufacturer:** Rolf C Hagen UK Ltd
- **Unit count:** 1.0 count

## Images

![Fluval U3 Internal Filter Carbon Cartridge - Image 1](https://m.media-amazon.com/images/I/41pxTmVeEXL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ as expected
*by S***S on 20 December 2019*

it was a genuine part for the U3 fish filter, works well and good price

### ⭐⭐⭐⭐⭐ Perfect for the Fluval U3 filter
*by M***R on 22 December 2024*

Perfect for the Fluval U3 filter. Arrived on time, well packaged.

### ⭐⭐⭐⭐ Quality.
*by P***N on 4 December 2025*

Very good but don’t fit into the fluval u3 as flush as the u4 ones fit into the respective filter.

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**Shop now:** [https://www.desertcart.co.uk/products/55356969-fluval-u3-internal-filter-carbon-cartridge](https://www.desertcart.co.uk/products/55356969-fluval-u3-internal-filter-carbon-cartridge)

---

*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-06-30*