---
product_id: 307674099
title: "Fluval U3 Internal Filter Carbon Cartridge"
brand: "fluval"
price: "£14.08"
currency: GBP
in_stock: true
reviews_count: 5
category: "Fluval"
url: https://www.desertcart.co.uk/products/307674099-fluval-u3-internal-filter-carbon-cartridge
store_origin: GB
region: United Kingdom
---

# Versatile for fresh, marine & reptile Easy cartridge replacement Chemical filtration power Fluval U3 Internal Filter Carbon Cartridge

**Brand:** fluval
**Price:** £14.08
**Availability:** ✅ In Stock

## Summary

> 🌟 Elevate your aquarium’s clarity game with Fluval U3’s ultimate filtration upgrade!

## Quick Answers

- **What is this?** Fluval U3 Internal Filter Carbon Cartridge by fluval
- **How much does it cost?** £14.08 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/307674099-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

- • **Fine Debris Trap:** Captures microscopic particles to keep your tank crystal clear and your aquatic life thriving.
- • **Effortless Maintenance:** Quick and easy cartridge swaps mean less downtime and more time enjoying your aquarium.
- • **Universal Compatibility:** Perfectly suited for freshwater, marine, and reptile tanks—one cartridge, endless possibilities.
- • **Custom Fit for Fluval U3:** Seamlessly integrates with your Fluval U3 filter for optimal performance without hassle.
- • **Precision Chemical Filtration:** Removes impurities and enhances water clarity for a pristine aquatic environment.

## Overview

The Fluval U3 Internal Filter Carbon Cartridge delivers high-efficiency chemical filtration tailored specifically for the Fluval U3 filter. Designed to trap fine debris and remove impurities, it enhances water clarity across freshwater, marine, and reptile environments. Easy to replace and maintain, this cartridge ensures your aquatic ecosystem stays vibrant and healthy with minimal effort.

## Description

Great value for money, top quality product. Great value for money, top quality product. Great value for money, top quality product. Great value for money, top quality product.

Review: policarbonato para el canister interno fluval u3 - muy buen material de policarbonato para usar en el compartimento del policarbonato junto con una esponja para la filtración quimica y mecánica que lleva este excelente canister interno fluval u3 , que es muy facil de limpiar, mis peces disco estan felices y muy agradecidos
Review: Aquarium Filters - My favorite brand of filter replacements for my aquarium filters. Reliable product at a good price.

## 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 |
| Allergen Information | Nut Free |
| Best Sellers Rank | #77,687 in Kitchen ( See Top 100 in Kitchen ) #263 in Water Filter Cartridges |
| Brand | Fluval |
| Brand Name | Fluval |
| Country of Publication | USA |
| Customer Reviews | 4.6 out of 5 stars 1,285 Reviews |
| Global Trade Identification Number | 00015561104913 |
| Included Components | Fluval U3 Filter Poly/Carbon Catridge (2 pack) |
| 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 | Hagen |
| Manufacturer Part Number | A491 |
| Model Number | A491 |
| Pet Type | Fish |
| Target Species | Fish |
| UPC | 015561104913 |
| Unit Count | 1 Count |
| Unit count | 1 Count |

## Product Details

- **Brand:** Fluval
- **Item form:** Cartridge
- **Item weight:** 0.03 Kilograms
- **Manufacturer:** Hagen
- **UPC:** 015561104913

## Images

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ policarbonato para el canister interno fluval u3
*by M***Z on 11 December 2018*

muy buen material de policarbonato para usar en el compartimento del policarbonato junto con una esponja para la filtración quimica y mecánica que lleva este excelente canister interno fluval u3 , que es muy facil de limpiar, mis peces disco estan felices y muy agradecidos

### ⭐⭐⭐⭐⭐ Aquarium Filters
*by C***M on 22 March 2026*

My favorite brand of filter replacements for my aquarium filters. Reliable product at a good price.

### ⭐⭐⭐⭐⭐ Filterpads für Fluval U3
*by M***. on 24 February 2024*

Bestellt, zügig bekommen. Ersatz, wenn vorhandene Filterpads ihren Dienst versagen. Guter Fluval U3 Filter der nunmal diese Filtereinsätze benötigt. Der Preis ist allerdings heftig für die Filtereinsätze. Da sollte man/frau auch mal Rabatt bekommen bei mehrabnahme, meine Meinung

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**Shop now:** [https://www.desertcart.co.uk/products/307674099-fluval-u3-internal-filter-carbon-cartridge](https://www.desertcart.co.uk/products/307674099-fluval-u3-internal-filter-carbon-cartridge)

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