---
product_id: 243361337
title: "U4 Underwater Filter Poly/Carbon"
brand: "fluval"
price: "₨23710"
currency: LKR
in_stock: true
reviews_count: 5
category: "Fluval"
url: https://www.desertcart.lk/products/243361337-u4-underwater-filter-poly-carbon
store_origin: LK
region: Sri Lanka
---

# Freshwater & marine compatible Dual-sided poly/carbon filtration Fine debris removal U4 Underwater Filter Poly/Carbon

**Brand:** fluval
**Price:** ₨23710
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your aquarium’s clarity with dual-action filtration perfection!

## Quick Answers

- **What is this?** U4 Underwater Filter Poly/Carbon by fluval
- **How much does it cost?** ₨23710 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/243361337-u4-underwater-filter-poly-carbon)

## 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

- • **Long-Lasting Cartridge Set:** Includes two poly/carbon cartridges for extended filtration cycles and less frequent replacements.
- • **Optimized Fit for Fluval U4:** Designed as an original replacement cartridge ensuring seamless installation and peak performance.
- • **Compact & Lightweight Design:** Small footprint (7.1 x 7.1 x 4.6 cm) and only 51g, maintaining aquarium aesthetics without bulk.
- • **Dual-Action Chemical Filtration:** Polyester pad traps fine debris while carbon eliminates odors and harmful substances.
- • **Versatile Aquarium Compatibility:** Perfectly engineered for freshwater, marine, and reptile aquatic environments.

## Overview

The Fluval U4 Underwater Filter Poly/Carbon cartridge offers a dual-sided chemical filtration system combining polyester pads and activated carbon to effectively remove fine debris, contaminants, odors, and harmful substances. Compatible with freshwater, marine, and reptile tanks, this original replacement cartridge set ensures a perfect fit and sustained water clarity, all in a compact, lightweight design made in the USA.

## Description

Fluvial poly/carbon cartridges features two sides for effective chemical filtration, the crucial second stage in the filtration process. The polyester filter pad side filters out fine debris and contam.

Review: Works great!
Review: Som sagt originalfilter så det är perfekt passform men till ett bättre pris. Dessutom hyfsat snabb leverans. Rekommenderas starkt 👌

## Features

- Polyester/carbon cartridge provides thorough and effective chemical filtration
- Polyester filter pad side filters out fine debris and contaminants
- Carbon side filters out harmful liquid substances, colourants and odours
- For freshwater, marine or reptile environments
- Contains 2 poly/carbon cartridges
- For the fluval u4 underwater filter

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001XRVX8C |
| Best Sellers Rank | #103,475 in Pet Supplies ( See Top 100 in Pet Supplies ) #1,012 in Filter Accessories |
| Country of Origin | USA |
| Item Dimensions LxWxH | 7.1 x 7.1 x 4.6 Centimeters |
| Item Weight | 51 g |
| Item model number | A492 |
| Manufacturer | Hagen |
| Net Quantity | 1.0 Count |
| Product Dimensions | 7.11 x 7.11 x 4.57 cm; 51 g |

## Product Details

- **Brand:** Fluval
- **Global Trade Identification Number:** 00015561104920
- **Item Weight:** 0.05 Kilograms
- **Manufacturer:** Hagen
- **UPC:** 015561104920

## Images

![U4 Underwater Filter Poly/Carbon - Image 1](https://m.media-amazon.com/images/I/21sE-eXf5PL.jpg)
![U4 Underwater Filter Poly/Carbon - Image 2](https://m.media-amazon.com/images/I/31XdCPQY20L.jpg)
![U4 Underwater Filter Poly/Carbon - Image 3](https://m.media-amazon.com/images/I/419vlD1TFCL.jpg)
![U4 Underwater Filter Poly/Carbon - Image 4](https://m.media-amazon.com/images/I/41W-rElnyRL.jpg)
![U4 Underwater Filter Poly/Carbon - Image 5](https://m.media-amazon.com/images/I/519t8soBffL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by L***S on 25 April 2025*

Works great!

### ⭐⭐⭐⭐⭐ Review
*by M***A on 26 November 2023*

Som sagt originalfilter så det är perfekt passform men till ett bättre pris. Dessutom hyfsat snabb leverans. Rekommenderas starkt 👌

### ⭐⭐⭐⭐⭐ Review
*by N***L on 17 September 2024*

The filter cartridge arrived promptly the next day to be used in my newly set up fish tank. I was given a used filter from a friend and decided to use new cartridges and media inside. Once out of the pack the quality of the filter is excellent and so easy to install and fit inside of the filter housing. The top unclips which makes it so easy to remove and then clean. Since it has been in use the fish are all happy and healthy so it is doing exactly as it is meant to function. Money well spent on a quality product.

## Frequently Bought Together

- Fluval U4 Filter Carbon Cartridge
- Fluval U4 Internal Filter Foam Pad
- Fluval U Internal Filters Clean and Clear Cartridge, White

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**Shop now:** [https://www.desertcart.lk/products/243361337-u4-underwater-filter-poly-carbon](https://www.desertcart.lk/products/243361337-u4-underwater-filter-poly-carbon)

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-03-16*