---
product_id: 397430696
title: "BIO-FX, Biological Aquarium Filter Media Suitable for Most Aquariums and Filters, 5 Liters"
brand: "fluval"
price: "€ 105.08"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.hr/products/397430696-bio-fx-biological-aquarium-filter-media-suitable-for-most-aquariums
store_origin: HR
region: Croatia
---

# Prolonged contact time Interconnected micro-tunnels 5L inert ceramic media BIO-FX, Biological Aquarium Filter Media Suitable for Most Aquariums and Filters, 5 Liters

**Brand:** fluval
**Price:** € 105.08
**Availability:** ✅ In Stock

## Summary

> 🧬 Elevate your aquarium’s ecosystem with Fluval BIO-FX — where science meets serenity.

## Quick Answers

- **What is this?** BIO-FX, Biological Aquarium Filter Media Suitable for Most Aquariums and Filters, 5 Liters by fluval
- **How much does it cost?** € 105.08 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/397430696-bio-fx-biological-aquarium-filter-media-suitable-for-most-aquariums)

## 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

- • **Prevent Clogs & Boost Flow:** Linked cavities ensure free, even water flow to avoid blockages and maintain efficiency.
- • **Keep Water Chemistry Stable:** Safe, inert ceramic material that never alters your aquarium’s delicate balance.
- • **Maximize Biological Filtration:** Deep pore structure creates vast surface area for beneficial bacteria growth.
- • **Rapid Ammonia & Nitrite Reduction:** Supports high concentration of nitrifying bacteria for a healthier aquatic environment.
- • **Easy Maintenance for Peak Performance:** Simply rinse monthly with aquarium water and replace partially every 6 months.

## Overview

Fluval BIO-FX is a premium 5-liter biological filter media made from inert ceramic, designed to fit most canister filters and sumps. Its deep pore structure with interconnected micro-tunnels maximizes surface area for beneficial bacteria colonization, ensuring rapid reduction of harmful ammonia and nitrites. Engineered to maintain stable water chemistry and prevent clogging, it supports a healthier, balanced aquarium environment. Trusted by aquarists worldwide, Fluval BIO-FX combines cutting-edge filtration technology with easy maintenance for superior aquatic care.

## Description

Fluval BIO-FX is a premium biological media designed for use with canister filters and sumps of all sizes, including the flagship FX series and 07 series. Featuring a deep pore structure with interconnected micro-tunnels, BIO-FX offers a vast surface area where beneficial nitrifying biological activity can thrive. 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: Very good filter stone - A good helper for fish farming, it can cultivate nitrifying bacteria and is worth buying!
Review: Good product - Nice big box with lots of surface area. Includes a mesh bag.

## Features

- Biological filter media made from safe, inert ceramic material that does not alter water chemistry
- Deep pore structure with interconnected micro-tunnels offers vast surface area for biological activity to occur
- Linked cavities permit free and even water flow, discourage blockages and prolong contact time for superior and effective biological filtration
- Allows for the establishment of a high concentration of biological activity to reduce ammonia and nitrite quickly and efficiently for a healthier aquarium
- For best results, rinse monthly using aquarium water and replace partially every 6 months and for optimal filtration, place in the last stage of the filtration process

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Fluval |
| Customer Reviews | 4.8 out of 5 stars 341 Reviews |
| Item Form | Ceramic |
| Item Weight | 2.84 Kilograms |
| Liquid Volume | 5 Liters |
| Manufacturer | Rolf C. Hagen (USA) Corp. |
| UPC | 015561114592 |

## Product Details

- **Brand:** Fluval
- **Item Form:** Ceramic
- **Item Weight:** 2.84 Kilograms
- **Liquid Volume:** 5 Liters
- **Manufacturer:** Rolf C. Hagen (USA) Corp.

## Images

![BIO-FX, Biological Aquarium Filter Media Suitable for Most Aquariums and Filters, 5 Liters - Image 1](https://m.media-amazon.com/images/I/81+njiIgtQL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very good filter stone
*by P***U on June 17, 2025*

A good helper for fish farming, it can cultivate nitrifying bacteria and is worth buying!

### ⭐⭐⭐⭐⭐ Good product
*by E***T on August 1, 2025*

Nice big box with lots of surface area. Includes a mesh bag.

### ⭐⭐⭐⭐⭐ It Just Works!
*by H***T on December 16, 2024*

It's hard to write a review for something as simple as aquarium media but it just simply works. It doesn't make any bold claims like denitrification but as the ability to house beneficial bacteria it works perfect and is priced very reasonably to fill a sump or a large canister like a FX6.

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-06*