---
product_id: 48573054
title: "FX4/5/6 Filter Foam Block"
brand: "fluval"
price: "€ 39.94"
currency: EUR
in_stock: true
reviews_count: 13
category: "Fluval"
url: https://www.desertcart.gr/products/48573054-fx4-5-6-filter-foam-block
store_origin: GR
region: Greece
---

# Custom fit prevents debris bypass Ideal pore size for optimal water flow Boosts biological filtration efficiency FX4/5/6 Filter Foam Block

**Brand:** fluval
**Price:** € 39.94
**Availability:** ✅ In Stock

## Summary

> 🧼 Keep your aquarium pristine with the foam that filters like a pro!

## Quick Answers

- **What is this?** FX4/5/6 Filter Foam Block by fluval
- **How much does it cost?** € 39.94 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/48573054-fx4-5-6-filter-foam-block)

## 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

- • **Durable & Lightweight:** Crafted for easy handling and extended lifespan without compromising filtration power.
- • **Optimized Pore Design:** Balances superior water flow with maximum particle capture for longer-lasting performance.
- • **Dual Environment Ready:** Perfectly compatible with both freshwater and saltwater aquariums for versatile use.
- • **Enhanced Bio-Filtration:** Supports beneficial bacteria growth to maintain crystal-clear, healthy aquatic habitats.
- • **Precision Fit, Zero Bypass:** Engineered to seal perfectly in FX4/5/6 filters, ensuring no debris escapes filtration.

## Overview

The Fluval FX4/5/6 Filter Foam Block is a genuine, custom-fit mechanical filtration media designed to trap debris efficiently while optimizing water flow. Its ideal pore size enhances biological filtration, supporting healthy bacteria growth in both freshwater and marine aquariums. Lightweight and durable, it ensures long-lasting performance tailored for Fluval’s premium external filters.

## Description

Product Description Fluval Foam Filter Block for Fluval FX4/5/6 external aquarium filters, genuine Fluval media. Directions Fluval Foam Inserts capture large particles and debris for effective mechanical filtration, the crucial first stage in the filtration process. Custom fit to prevent bypass, they have a pore size that allows efficient water flow with less clogging for long-lasting filtration. These inserts also enhance biological filtration. For freshwater and marine environments. For filter models: FX5 P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); Box Contains 3 Foams See more

Review: Filter Media - Great and original product, would recommend using original product.
Review: Why packs of 3? - I have absolutely no idea, why these come in packs of 3? I have the fx6, so I require 6, to fill the trays. The fx4 requires 4? This is not too bad for me, as I buy to packs and sorted, the fx4 owners must be fuming? Why not pack in two's makes much more sense? These are relatively expensive for what they are as well.

## Features

- Provides effective mechanical filtration
- Custom fit to prevent debris bypass
- Ideal pore size allows efficient water flow and longer media lifespan
- Enhances the biological filtration process
- For use in freshwater or saltwater aquariums

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000HHLUJG |
| Batteries Included | No |
| Batteries required | No |
| Best Sellers Rank | 35,018 in Pet Supplies ( See Top 100 in Pet Supplies ) 511 in Aquarium Filter Accessories |
| Breed Recommendation | Large Breeds |
| Colour | weiß |
| Customer Reviews | 4.7 4.7 out of 5 stars (696) |
| Date First Available | 26 Mar. 2010 |
| Flavor | Foam |
| Item Weight | 170 g |
| Item model number | A228A1 |
| Number of Items | 1 |
| Pet Life Stage | All ages |
| Pet Type | Fish |
| Product Dimensions | 12.19 x 8.89 x 4.32 cm; 170 g |
| Quantity | 1 |
| Size | FX5 (3 Pack) |
| Special features | Lightweight, Portable |

## Product Details

- **Brand:** Fluval
- **Breed recommendation:** Large Breeds
- **Cartoon character:** Foam Pattern
- **Recommended uses for product:** Playing
- **Theme:** Food and Drinks

## Images

![FX4/5/6 Filter Foam Block - Image 1](https://m.media-amazon.com/images/I/71nsu0noiUL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Filter Media
*by B***Y on 26 February 2024*

Great and original product, would recommend using original product.

### ⭐⭐⭐⭐⭐ Why packs of 3?
*by M***E on 18 October 2021*

I have absolutely no idea, why these come in packs of 3? I have the fx6, so I require 6, to fill the trays. The fx4 requires 4? This is not too bad for me, as I buy to packs and sorted, the fx4 owners must be fuming? Why not pack in two's makes much more sense? These are relatively expensive for what they are as well.

### ⭐⭐⭐⭐⭐ Perfect
*by K***L on 2 November 2019*

Spot on, substantially cheaper than my local store!!!

## Frequently Bought Together

- Fluval FX5 Filter Foam Block - 3-Pack
- Fluval BioMax Biological Material Remover, 500 g - Biological Filter Media for Aquariums

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**Shop now:** [https://www.desertcart.gr/products/48573054-fx4-5-6-filter-foam-block](https://www.desertcart.gr/products/48573054-fx4-5-6-filter-foam-block)

---

*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-02-27*