---
product_id: 3891525
title: "Aqua Clear AquaClear 20 BioMax, Aquarium Filter Replacement Media, A1370A1"
brand: "fluval"
price: "A$21"
currency: AUD
in_stock: true
reviews_count: 13
category: "Fluval"
url: https://www.desertcart.com.au/products/3891525-aqua-clear-aquaclear-20-biomax-aquarium-filter-replacement-media-a1370a1
store_origin: AU
region: Australia
---

# Fits AquaClear 20, supports fresh & saltwater 30% boost in bio-filtration efficiency Large surface area for beneficial bacteria Aqua Clear AquaClear 20 BioMax, Aquarium Filter Replacement Media, A1370A1

**Brand:** fluval
**Price:** A$21
**Availability:** ✅ In Stock

## Summary

> 🦠 Elevate Your Aquarium’s Ecosystem—Because Your Fish Deserve the Best!

## Quick Answers

- **What is this?** Aqua Clear AquaClear 20 BioMax, Aquarium Filter Replacement Media, A1370A1 by fluval
- **How much does it cost?** A$21 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/3891525-aqua-clear-aquaclear-20-biomax-aquarium-filter-replacement-media-a1370a1)

## 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

- • **Compact Yet Powerful:** Small footprint (1.8 x 2.5 x 3.5 inches) packs a punch in maintaining crystal-clear water and a thriving tank environment.
- • **Effortless Installation:** Comes in a convenient mesh bag designed for quick, no-fuss replacement in your AquaClear 20 Power Filter.
- • **Trusted Brand Reliability:** From Fluval, a leader in aquarium care, ensuring consistent quality and peace of mind for your aquatic ecosystem.
- • **Maximize Your Tank’s Health:** BioMax’s advanced bio-ring structure promotes rapid beneficial bacteria growth, slashing ammonia and nitrite levels by 30%.
- • **Versatile Aquarium Compatibility:** Perfectly engineered for both freshwater and saltwater tanks up to 20 gallons—your all-in-one filtration upgrade.

## Overview

The AquaClear 20 BioMax replacement media is a scientifically designed filtration insert that enhances biological filtration by 30% through its unique bio-ring pore structure. Compatible with AquaClear 20 Power Filters, it supports both freshwater and saltwater aquariums up to 20 gallons. Easy to install and backed by Fluval’s trusted brand, it effectively reduces harmful ammonia and nitrite, ensuring a healthier aquatic environment.

## Description

AquaClear 20 BioMax is replacement filter media for the AquaClear 20 Power Filter. AquaClear 20 BioMax provides an optimal environment for the colonization and growth of beneficial bacteria, which is essential for effective biological filtration and water purification. BioMax’s complex bio-ring pore structure allows beneficial, toxin-reducing bacteria to thrive. By reducing toxins such as ammonia and nitrite, BioMax effectively increases biological filtration efficiency by 30%. BioMax comes in a mesh bag for quick and easy installation. Exclusively designed for the AquaClear 20 Power Filter, BioMax is suitable for fresh and saltwater aquariums. AquaClear creates a wide variety of products for freshwater tanks such as fish tank accessories, fish tank decorations, and aquarium filter media that is perfect for large and small fish tanks.

Review: Never have a filter issue! - Best filter for your tank. Make sure your priming the filter when starting
Review: It’s amazing - You get what you pay for this is amazing OK for 4 to 5 dollars to three dollars. This is a pretty good pricing that I’ve ever seen on desertcart to be honest because everything so overpriced now I’m gonna give my pros and cons about this product and honestly, there’s a lot of better pros than cons for the pros. I noticed that this is pretty good in packaging. Technically, I don’t like the blue packaging on there, but we can leave that for the cons. I separated the bio balls in the blue packaging so or the blue packet or whatever the hell you wanna call it and put it into my hang on the back filter for the quantity you get at least one for the money you wanna buy for personally I love this product this product was pretty good in my tank definitely I still need to get more bio media but not from this company cause girl no shade. This company is all right. OK another pro is this does clear out. Your ammonia is better than chemical filtration. just gotta say I use this product a lot and it’s a pretty good product for the cons again the blue packaging. gotta go change it to something like other than blue because and then the extra material on the blue packet in the code of bio balls. I’m like I gotta just cut this off like what the hell another thing is is that there’s nothing really else to give about cons because it’s not a chemical filtration product so I can’t really judge the hell out of this product so you know

## Features

- BioMax large surface area provides optimal colonization of beneficial bacteria
- Promotes ammonia and nitrite reduction
- Replacement media designed to fit the AquaClear 20 Power Filter
- Suitable for both freshwater and saltwater aquariums up to 20 gallons
- Includes one insert of AquaClear BioMax

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0006JLO5K |
| ASIN  | B0006JLO5K |
| Age Range Description | All Life Stages |
| Best Sellers Rank | #5,822 in Pet Supplies ( See Top 100 in Pet Supplies ) #71 in Aquarium Filter Accessories |
| Brand Name | Fluval |
| Color | White |
| Customer Reviews | 4.7 4.7 out of 5 stars (9,166) |
| Date First Available | December 6, 2005 |
| Date First Available  | December 6, 2005 |
| Department | Unisex-Adult |
| Department  | Unisex-Adult |
| Directions | Follow individual packaging instructions for recommended replacement intervals. |
| Included Components | All Items in Description |
| Is Discontinued By Manufacturer  | No |
| Item Dimensions LxWxH | 1.8 x 2.5 x 3.5 inches |
| Item Package Dimensions L x W x H | 4.13 x 2.44 x 1.73 inches |
| Item Weight | 0.01 Ounces |
| Item model number | A1370A1 |
| Item model number  | A1370A1 |
| Manufacturer | Rolf C. Hagen (USA) Corp. |
| Manufacturer  | Rolf C. Hagen (USA) Corp. |
| Material | Plastic |
| Model Name | HAGEN AQUACLEAR BIOMAX MINI\20 |
| Number of Items | 1 |
| Product Dimensions  | 1.8 x 2.5 x 3.5 inches; 0.01 ounces |
| Size | AC20 (Old) 1-Pack |
| Specific Uses for Product | Indoor |
| Style | Biomax |
| Target Audience Keyword | ( reptiles | amphibians ) |
| Warranty Description | Manufacturer Warranty |

## Product Details

- **Brand:** Fluval
- **Item Form:** Insert
- **Item Weight:** 0.01 Ounces
- **Liquid Volume:** 20 Gallons
- **Manufacturer:** Rolf C. Hagen (USA) Corp.

## Images

![Aqua Clear AquaClear 20 BioMax, Aquarium Filter Replacement Media, A1370A1 - Image 1](https://m.media-amazon.com/images/I/810zI58q-EL.jpg)

## Questions & Answers

**Q: Does this act like purigen? Does it make the water clearer? Or is that the carbon?**
A: The BioMax media is basically an insert that provides a place for beneficial bacteria to grow.  These good bacteria will help reduce the levels of ammonia and nitrite in your system.  Purigen is an actual absorbing type product that removes impurities from your system water.  I listed some differences between purigen and carbon below.Purigen ) Removes things in the water before they turn into Nitrates slowing water degradation) Clears up the water making it sparkling clear) Can be regenerated multiple times) May last for quite awhile before it is exhausted and needs to be regenerated depending on it use) Does not effect or remove medicines ) Turns darker brown color as it is exhausted and lightens again after regenerationCarbon) Removes most medicines) Cannot be generated) Usually is exhausted relatively quickly) Removes things in the water but does not clear the water) Can leech things back into the water it once removed if it is not changed once exhausted) Shows NO changes as it is exhaustedCarbon is similar to the purigen product in that it absorbs odors, discoloration and impurities in your water but they areHope this helps answer your question.

**Q: Are these the kind of net bags that you have to fill with the red plastic piece?**
A: No

**Q: Does this make water cloudy?**
A: Ive never noticed that

**Q: Does it matter what size? I want to save money and get the 70 gal for my 3 gal tank lol**
A: The size doesn't matter, I bought the cheapest one and took the biomax out of the bag so they fit-for a 3 gallon from the 70, divide the biomax bag equally into about 12 piles, then put one of the piles into your filter and save the rest (as you will want to change them out eventually) this should give you enough filtration for a 3 gallon with out overdoing it.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Never have a filter issue!
*by C***S on December 31, 2025*

Best filter for your tank. Make sure your priming the filter when starting

### ⭐⭐⭐⭐⭐ It’s amazing
*by V***V on February 6, 2026*

You get what you pay for this is amazing OK for 4 to 5 dollars to three dollars. This is a pretty good pricing that I’ve ever seen on Amazon to be honest because everything so overpriced now I’m gonna give my pros and cons about this product and honestly, there’s a lot of better pros than cons for the pros. I noticed that this is pretty good in packaging. Technically, I don’t like the blue packaging on there, but we can leave that for the cons. I separated the bio balls in the blue packaging so or the blue packet or whatever the hell you wanna call it and put it into my hang on the back filter for the quantity you get at least one for the money you wanna buy for personally I love this product this product was pretty good in my tank definitely I still need to get more bio media but not from this company cause girl no shade. This company is all right. OK another pro is this does clear out. Your ammonia is better than chemical filtration. just gotta say I use this product a lot and it’s a pretty good product for the cons again the blue packaging. gotta go change it to something like other than blue because and then the extra material on the blue packet in the code of bio balls. I’m like I gotta just cut this off like what the hell another thing is is that there’s nothing really else to give about cons because it’s not a chemical filtration product so I can’t really judge the hell out of this product so you know

### ⭐⭐⭐⭐⭐ Does a great job.
*by P***L on December 8, 2025*

Always works great

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-27*