---
product_id: 50573417
title: "U4 Internal Filter Foam Pad"
brand: "fluval"
price: "B/.30"
currency: PAB
in_stock: true
reviews_count: 13
category: "Fluval"
url: https://www.desertcart.com.pa/products/50573417-u4-internal-filter-foam-pad
store_origin: PA
region: Panama
---

# Versatile for freshwater & marine Custom-fit foam pad Effective mechanical filtration U4 Internal Filter Foam Pad

**Brand:** fluval
**Price:** B/.30
**Availability:** ✅ In Stock

## Summary

> 🧼 Elevate your aquarium’s clarity with the perfect foam fit!

## Quick Answers

- **What is this?** U4 Internal Filter Foam Pad by fluval
- **How much does it cost?** B/.30 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/products/50573417-u4-internal-filter-foam-pad)

## 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

- • **Effortless Replacement:** Designed for quick swaps, minimizing downtime and hassle.
- • **Multi-Environment Ready:** Perfectly engineered for freshwater, marine, and reptile tanks alike.
- • **Trusted Aquarist Choice:** Join thousands of pros who rely on Fluval’s legacy of innovation.
- • **Precision Fit for Fluval U4:** Seamlessly integrates with your U4 filter for optimal performance.
- • **Superior Mechanical Filtration:** Captures debris efficiently to keep your aquarium crystal clear.

## Overview

The Fluval U4 Internal Filter Foam Pad is a precision-engineered replacement foam designed exclusively for the Fluval U4 filter. It delivers effective mechanical filtration by trapping debris, ensuring pristine water quality across freshwater, marine, and reptile environments. Lightweight and easy to replace, this foam pad supports all life stages of aquatic pets and is backed by Fluval’s decades-long reputation for innovation and reliability.

## Description

From the manufacturer About us With the introduction of the world's first 3-stage filter with synchronous motor technology – a milestone that is still used in the industry today – Fluval made the breakthrough in the aquarium scene in 1975. Since then, Fluval has built a legacy around this pioneering spirit and has adapted tirelessly in an ever-changing world to bring innovative aquarium products to market that are at the forefront of technology and set the benchmark in quality, style and functionality. Beyond its role as a manufacturer, Fluval prides itself on its charitable and educational efforts that benefit the aquaristics community, whether to support the conservation of wild coral reefs with financial means or jumping on a plane to document endangered fish species on the other end of the world. Our mission is not only to make products that mimic the natural world around us, but to inspire aquarists from beginner to professional to enjoy and respect the hobby we so much loved today and in the future. Foam cartridge Size U4U2 Item weight 38 g19 g

Review: Necessary filter item - Necessary aquarium filter item I buy these on a regular basis. They do an excellent job of filtering the aquarium. Only last so long as they have to be rinsed every few days.
Review: Great - Great product and cheaper than elsewhere

## Features

- Provides effective mechanical filtration
- Custom fit for the Fluval U4 Filter
- Easy to replace
- Works in freshwater, marine or reptile environments

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001XRSSJ4 |
| Allergen Information | Nut Free |
| Batteries Included | No |
| Batteries required | No |
| Best Sellers Rank | 5,854 in Pet Supplies ( See Top 100 in Pet Supplies ) 39 in Aquarium Filter Accessories |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,558) |
| Date First Available | 2 Feb. 2010 |
| Item Form | Foam |
| Item Weight | 38 g |
| Item model number | A488 |
| Number of Items | 1 |
| Pet Life Stage | All Life Stages |
| Pet Type | Fish |
| Product Dimensions | 6.86 x 6.86 x 27.94 cm; 38 g |
| Quantity | 1 |
| Size | U4 |

## Product Details

- **Brand:** Fluval
- **Item form:** Foam
- **Item weight:** 0.04 Kilograms
- **Manufacturer:** Rolf C Hagen UK Ltd
- **UPC:** 015561104883

## Images

![U4 Internal Filter Foam Pad - Image 1](https://m.media-amazon.com/images/I/51wc8ighknS.jpg)

## Questions & Answers

**Q: How often does it need to be changed or replaced ?**
A: I cut the replacement filter in half, and replace a half of it every month.

**Q: Does any1 know if you can double up on the pads in a Fluval U4 instead of using the polyclear or polycarbon cartridges too??**
A: You could if they fit but the filter will not work anywhere near as efficiently.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Necessary filter item
*by P***N on 25 January 2024*

Necessary aquarium filter item I buy these on a regular basis. They do an excellent job of filtering the aquarium. Only last so long as they have to be rinsed every few days.

### ⭐⭐⭐⭐⭐ Great
*by A***R on 18 December 2025*

Great product and cheaper than elsewhere

### ⭐⭐⭐⭐ Do what they are supposed to
*by A***N on 17 September 2025*

These are pretty good, a bit expensive for what they are. They do clog up pretty quick so won’t last that long before they need to be replaced. When you try to clean them, they are a bit delicate and can rip

## 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.pa/products/50573417-u4-internal-filter-foam-pad](https://www.desertcart.com.pa/products/50573417-u4-internal-filter-foam-pad)

---

*Product available on Desertcart Panama*
*Store origin: PA*
*Last updated: 2026-02-21*