---
product_id: 2858702
title: "Fluval U4 Bio-Foam Pad, Replacement Underwater Aquarium Filter Media, A488"
brand: "fluval"
price: "523907₫"
currency: VND
in_stock: false
reviews_count: 13
url: https://www.desertcart.vn/products/2858702-fluval-u4-bio-foam-pad-replacement-underwater-aquarium-filter-media
store_origin: VN
region: Vietnam
---

# Optimized pore size for water flow Custom-fit foam pad Long-lasting clog-resistant filtration Fluval U4 Bio-Foam Pad, Replacement Underwater Aquarium Filter Media, A488

**Brand:** fluval
**Price:** 523907₫
**Availability:** ❌ Out of Stock

## Summary

> 🧼 Keep your tank pristine with the foam that fits like a glove!

## Quick Answers

- **What is this?** Fluval U4 Bio-Foam Pad, Replacement Underwater Aquarium Filter Media, A488 by fluval
- **How much does it cost?** 523907₫ with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/2858702-fluval-u4-bio-foam-pad-replacement-underwater-aquarium-filter-media)

## 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 superior water flow with effective particle capture, reducing clogging downtime.
- • **Trusted Brand Legacy:** Backed by Fluval’s 40+ years of innovation, ensuring premium quality and performance.
- • **Durable & Low Maintenance:** Long-lasting bio-foam material means fewer replacements and hassle-free rinsing.
- • **Precision Fit, Zero Escape:** Engineered exclusively for Fluval U4 to lock in debris and maximize filtration efficiency.
- • **Versatile Aquatic Compatibility:** Perfectly suited for freshwater, saltwater, and reptile tanks—one pad, endless ecosystems.

## Overview

The Fluval U4 Bio-Foam Pad is a precision-engineered replacement filter media designed exclusively for the Fluval U4 Underwater Filter. Its optimized pore size ensures efficient water flow while capturing large debris, providing long-lasting mechanical filtration. Suitable for freshwater, saltwater, and reptile environments, this durable foam pad offers hassle-free maintenance and is backed by Fluval’s decades of aquatic 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 |
|---------------|-------|
| ASIN | B001XRSSJ4 |
| ASIN  | B001XRSSJ4 |
| Age Range Description | All Life Stages |
| Best Sellers Rank | #30,976 in Pet Supplies ( See Top 100 in Pet Supplies ) #330 in Aquarium Filter Accessories |
| Brand Name | Fluval |
| Color | White |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,579) |
| Date First Available | August 19, 2004 |
| Date First Available  | August 19, 2004 |
| Department | Unisex-Adult |
| Department  | Unisex-Adult |
| Directions | Insert the pad into the Fluval U4 Underwater Filter chamber. Replace as needed based on filter usage and tank conditions. |
| Included Components | All items in description |
| Is Discontinued By Manufacturer  | No |
| Item Dimensions LxWxH | 2.7 x 2.7 x 11 inches |
| Item Package Dimensions L x W x H | 11.14 x 2.72 x 1.54 inches |
| Item Weight | 0.04 Kilograms |
| Item model number | A488 |
| Item model number  | A488 |
| Manufacturer | Rolf C. Hagen (USA) Corp. |
| Manufacturer  | Rolf C. Hagen (USA) Corp. |
| Material | Plastic |
| Model Name | Hagen FLUVAL U4 FOAM PAD |
| Number of Items | 1 |
| Product Dimensions  | 2.7 x 2.7 x 11 inches; 1.34 ounces |
| Size | U4 |
| Specific Uses for Product | Indoor |
| Style | Bio-Foam |
| Target Audience Keyword | algae-eaters, arachnids, arthropods, bats-animals, bearded-dragons, bees, beetles, betta-fish, bottom-feeder-fish, butterflies, cichlid-fish, crabs, dragonflies, fish, frogs, geckos, goldfish, hermit-crabs, iguanas, insects, invertebrate-fish, ladybugs, lizards, mollusks, newts, octopuses, rays, reptiles, salamanders, sharks, snails, snakes, spiders, tortoises, turtles |
| Warranty Description | Manufacturer Warranty |

## Product Details

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

## Images

![Fluval U4 Bio-Foam Pad, Replacement Underwater Aquarium Filter Media, A488 - Image 1](https://m.media-amazon.com/images/I/51wc8ighknS.jpg)

## Available Options

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

## 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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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-02-09*