---
product_id: 6859369
title: "HAGEN fl 20g Co2 Cartridges 3pk"
brand: "fluval"
price: "€ 30.13"
currency: EUR
in_stock: true
reviews_count: 13
category: "Fluval"
url: https://www.desertcart.hr/products/6859369-hagen-fl-20g-co2-cartridges-3pk
store_origin: HR
region: Croatia
---

# 3-pack convenience 20g CO2 capacity Made in Taiwan quality HAGEN fl 20g Co2 Cartridges 3pk

**Brand:** fluval
**Price:** € 30.13
**Availability:** ✅ In Stock

## Summary

> 🌿 Elevate your aquarium’s green game with precision CO2 power!

## Quick Answers

- **What is this?** HAGEN fl 20g Co2 Cartridges 3pk by fluval
- **How much does it cost?** € 30.13 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/6859369-hagen-fl-20g-co2-cartridges-3pk)

## 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

- • **Triple Pack Value:** Three cartridges in one set to keep your aquarium thriving without interruption
- • **Precision CO2 Boost:** Delivers optimal 20g CO2 per cartridge for lush aquatic plant growth
- • **Seamless Compatibility:** Designed specifically for Fluval Mini CO2 systems for effortless integration
- • **Durable Stainless Steel:** Robust cartridge construction ensures safe, reliable CO2 delivery every time
- • **Passive Diffusion System:** Dissolves CO2 gently into water, perfect for tanks up to 20 gallons

## Overview

The HAGEN FL 20g CO2 Cartridges 3-pack offers a reliable, easy-to-use CO2 source designed for Fluval Mini pressurized systems. Each stainless steel cartridge delivers 20 grams of CO2, ideal for enhancing plant growth in aquariums up to 20 gallons. Made in Taiwan, this pack ensures continuous, passive CO2 diffusion to maintain vibrant, healthy aquatic plants with minimal investment.

## Description

3 pack of 20 g replacement CO2 cartridges. Designed for use with the fluval Mini pressurized 20 g CO2 kit.

Review: Perfect product for my needs. - Perfect product for my needs.
Review: Cheap co2 that works - This is a passive co2 system. You will not see microbubbles of co2 diffusing. The CO2 is dissolved into the water column. If you have a smaller tank (20 gal or less) this is a good system to boost slow growing plants without a large investment.

## Features

- The Fluval Disposable CO2 Cartridge, 0.7 ounces is a pack of three cartridges that are replacement parts for the Fluval Mini CO2 Supply Set. Proper amounts of CO2 are important to ensure that the most important nutrients are available to plants to maintain vigorous, lush and vibrant growth and condition.
- Helps ensure plants receive proper amounts of CO2
- 3-pack
- Country Of Origin: Taiwan

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004G46QQI |
| ASIN  | B004G46QQI |
| Age Range Description | All Life Stages |
| Best Sellers Rank | #106,793 in Pet Supplies ( See Top 100 in Pet Supplies ) #1,859 in Aquarium Filter Accessories |
| Brand Name | Fluval |
| Color | White |
| Customer Reviews | 4.4 4.4 out of 5 stars (295) |
| Date First Available | December 15, 2010 |
| Date First Available  | December 15, 2010 |
| Directions | Use as per directed on product. |
| Included Components | All Items listed in Description |
| Is Discontinued By Manufacturer  | No |
| Item Dimensions LxWxH | 0.9 x 3.6 x 6.8 inches |
| Item Package Dimensions L x W x H | 4.3 x 3.4 x 0.9 inches |
| Item Weight | 20 Grams |
| Item model number | A7541 |
| Item model number  | A7541 |
| Manufacturer | Rolf C. Hagen (USA) Corp. |
| Manufacturer  | Rolf C. Hagen (USA) Corp. |
| Material | Stainless Steel |
| Model Name | HAGEN FL 20G CO2 CARTRIDGES 3PK |
| Number of Items | 1 |
| Product Dimensions  | 0.9 x 3.6 x 6.8 inches; 0.71 ounces |
| Specific Uses for Product | Indoor |
| Style | Modern |
| Target Audience Keyword | fish, fish;algae-eaters; betta-fish; bottom-feeder-fish; cichlid-fish; goldfish; invertebrate-fish; mollusks; octopuses; rays; sharks; snails |
| Warranty Description | Manufacturer Warranty |

## Product Details

- **Brand:** Fluval
- **Item Form:** Cartridge
- **Item Weight:** 20 Grams
- **Manufacturer:** Rolf C. Hagen (USA) Corp.
- **UPC:** 015561175418

## Images

![HAGEN fl 20g Co2 Cartridges 3pk - Image 1](https://m.media-amazon.com/images/I/61DUZhh6nwL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect product for my needs.
*by B***O on December 3, 2025*

Perfect product for my needs.

### ⭐⭐⭐⭐⭐ Cheap co2 that works
*by N***9 on June 2, 2024*

This is a passive co2 system. You will not see microbubbles of co2 diffusing. The CO2 is dissolved into the water column. If you have a smaller tank (20 gal or less) this is a good system to boost slow growing plants without a large investment.

### ⭐⭐⭐⭐⭐ Got exactly what i ordered
*by R***N on February 26, 2012*

These little tanks last about a 3-4 weeks when used right. there a bit pricey but well worth it to have reliable CO2 and healthy plants

## Frequently Bought Together

- HAGEN fl 20g Co2 Cartridges 3pk
- HAGEN FL MINI PRESSURIZED 20G CO2 KIT
- Fluval 88g-CO2 Bubble Counter - 3.1 Ounces

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-13*