---
product_id: 2858702
title: "U4 Bio-Foam Pad, Replacement Underwater Aquarium Filter Media, A488"
brand: "fluval"
price: "A$16"
currency: AUD
in_stock: true
reviews_count: 8
category: "Fluval"
url: https://www.desertcart.com.au/products/2858702-u4-bio-foam-pad-replacement-underwater-aquarium-filter-media-a488
store_origin: AU
region: Australia
---

# Versatile for freshwater & saltwater Optimized pore size for water flow Custom-fit foam pad U4 Bio-Foam Pad, Replacement Underwater Aquarium Filter Media, A488

**Brand:** fluval
**Price:** A$16
**Availability:** ✅ In Stock

## Summary

> 🧼 Keep your tank crystal clear with Fluval’s perfect-fit bio-foam — because your aquatic friends deserve the best!

## Quick Answers

- **What is this?** U4 Bio-Foam Pad, Replacement Underwater Aquarium Filter Media, A488 by fluval
- **How much does it cost?** A$16 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/2858702-u4-bio-foam-pad-replacement-underwater-aquarium-filter-media-a488)

## 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

- • **Flow-Optimized Foam:** Ideal pore size balances maximum water flow with minimal clogging for long-lasting, efficient filtration.
- • **Trusted Brand Legacy:** Backed by Fluval’s 4.7-star reputation and decades of pioneering filtration innovation.
- • **Effortless Maintenance:** Easy to remove and rinse, keeping your aquarium pristine without the hassle.
- • **Precision Fit, Zero Escape:** Custom-designed to snugly fit the Fluval U4 filter chamber, ensuring no debris bypasses your filtration system.
- • **Universal Aquatic Compatibility:** Engineered for freshwater, saltwater, and reptile tanks—one pad to rule all your aquatic habitats.

## Overview

The Fluval U4 Bio-Foam Pad is a precision-engineered replacement filter media designed exclusively for the Fluval U4 Underwater Filter. It provides effective mechanical filtration by capturing large debris with a custom-fit foam that prevents bypass. Its optimized pore size ensures efficient water flow and reduces clogging, extending filter life. Suitable for freshwater, saltwater, and reptile environments, this pad is easy to maintain and backed by Fluval’s trusted legacy in aquarium innovation.

## Description

The Fluval Bio-Foam Pad was designed specifically for the U4 Underwater Filter model to captures large particles and debris for effective mechanical filtration, the crucial first stage in the filtration process. Custom fit to prevent bypass, the pad has a pore size that allows efficient water flow with less clogging for long-lasting filtration. The Fluval Bio-Foam Pad is suitable for freshwater, marine or reptile environments. For more fish tank accessories, check out other Fluval products including aquarium filters, aquarium heaters, aquarium air pumps, aquarium lights, aquarium rocks, aquarium thermometers, and aquarium stands. Fluval has a wide variety of products that are perfect for your pet fish to enjoy in any large fish tank, small fish tank, saltwater tank or freshwater tank. Fluval broke onto the aquatic scene in 1975 by introducing the world’s first 3-stage filter with synchronous motor technology – a breakthrough that is still applied in the industry today. Since then, Fluval has built a legacy around this pioneering spirit, relentlessly adapting in a changing world to launch innovative aquarium products that remain at the forefront of technology, and which set the bar in quality, style and functionality. Fluval’s mission is not just about building products that mimic the natural world, but inspiring aquarists of all skill levels to enjoy and respect the hobby for generations to come.

Review: Works great - fit like they should, some people don't like this filter in the reviews but they do a decent job and are easy to take to take out and rinse.
Review: Great quality unless you build your own filters. - Go with the name brand. Save the headache.

## Features

- Provides effective mechanical filtration
- Fits perfectly inside the filter chamber to prevent debris from escaping
- Ideal pore size allows efficient water flow, less clogging and long-lasting filtration
- Suitable for freshwater, saltwater or reptile environments
- Specially designed for use with the Fluval U4 Underwater Filter

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Fluval |
| Customer Reviews | 4.7 out of 5 stars 1,583 Reviews |
| Global Trade Identification Number | 00015561104883 |
| Item Form | Foam |
| Item Weight | 0.04 Kilograms |
| Manufacturer | Rolf C. Hagen (USA) Corp. |
| UPC | 015561104883 |

## Product Details

- **Brand:** Fluval
- **Item Form:** Foam
- **Item Weight:** 0.04 Kilograms
- **Manufacturer:** Rolf C. Hagen (USA) Corp.
- **UPC:** 015561104883

## Images

![U4 Bio-Foam Pad, Replacement Underwater Aquarium Filter Media, A488 - Image 1](https://m.media-amazon.com/images/I/51mpiwLZeFL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great
*by A***R on December 30, 2023*

fit like they should, some people don't like this filter in the reviews but they do a decent job and are easy to take to take out and rinse.

### ⭐⭐⭐⭐⭐ Great quality unless you build your own filters.
*by D***. on November 7, 2025*

Go with the name brand. Save the headache.

### ⭐⭐⭐⭐⭐ Special water filters for aquariums
*by N***E on January 11, 2026*

Can’t find these in stores any more. Happy I could find them on Amazon. They fit my aquarium filter perfectly

## Frequently Bought Together

- Fluval U4 Bio-Foam Pad, Replacement Underwater Aquarium Filter Media, A488
- Fluval U Underwater Filter BioMax
- Fluval U4 Poly-Carb Cartridge, Replacement Underwater Aquarium Filter Media, 2-Pack, A492

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**Shop now:** [https://www.desertcart.com.au/products/2858702-u4-bio-foam-pad-replacement-underwater-aquarium-filter-media-a488](https://www.desertcart.com.au/products/2858702-u4-bio-foam-pad-replacement-underwater-aquarium-filter-media-a488)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-24*