---
product_id: 57473327
title: "Seachem Matrix Bio Media, 4 Litre"
brand: "seachem"
price: "HK$1241"
currency: HKD
in_stock: true
reviews_count: 13
category: "Seachem"
url: https://www.desertcart.hk/products/57473327-seachem-matrix-bio-media-4-litre
store_origin: HK
region: Hong Kong
---

# Controls ammonia, nitrite & nitrate High surface area for bacteria colonization Supports aerobic & anaerobic bacteria Seachem Matrix Bio Media, 4 Litre

**Brand:** seachem
**Price:** HK$1241
**Availability:** ✅ In Stock

## Summary

> ♻️ Elevate your aquarium’s ecosystem with the bio media pros trust!

## Quick Answers

- **What is this?** Seachem Matrix Bio Media, 4 Litre by seachem
- **How much does it cost?** HK$1241 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/57473327-seachem-matrix-bio-media-4-litre)

## Best For

- seachem enthusiasts

## Why This Product

- Trusted seachem brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Integration:** Fits seamlessly into canister, HOB, internal, or sump filters
- • **Set & Forget Durability:** Lasts for years without crumbling or compacting, minimizing maintenance
- • **Cost-Effective Longevity:** Reduces replacement frequency, saving money for multi-tank setups
- • **Optimized Bacterial Habitat:** Maximizes beneficial bacteria growth with superior surface area
- • **Platinum Standard Bio Filtration:** Delivers consistent, reliable water quality across all filter types

## Overview

Seachem Matrix Bio Media is a 4-litre high-capacity biological filtration media designed to control ammonia, nitrite, and nitrate by supporting both aerobic and anaerobic bacteria. Its durable granules provide an extensive surface area for beneficial bacteria colonization, ensuring stable water parameters with minimal maintenance. Compatible with various filter types, it offers long-lasting performance and excellent value for freshwater aquarium enthusiasts.

## Description

Product Description Seachem Matrix 4Ltr Directions 1. Rinse the Matrix media before use. 2. Place the Matrix media in any kind of filter. 3. For every 25 gallons of water, use 250 milliliters of Matrix media. 4. Matrix media removes ammonia, nitrite, and nitrate from the water. 5. Matrix media is effective in canister filters and provides a large surface area for beneficial bacteria. 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 water treatment See more

Review: Platinum Standard Bio Media! - I use Matrix across all four of my aquariums, and it’s become my “buy once, trust always” biological media. It’s reliable, easy to use, and delivers the same steady performance no matter which filter I drop it into—canister, HOB, internal, or a sump basket. What I notice in day‑to‑day use The fish stay happy and the water stays stable. Matrix gives beneficial bacteria tons of room to colonise, which helps process waste efficiently and keeps parameters on an even keel. It’s properly “set and forget.” Once it’s in place, I don’t have to babysit it or swap it out every few months. A quick rinse in old tank water during maintenance is all it usually needs. It doesn’t crumble or compact like some ceramic rings. The pieces keep their shape, so flow through the media stays consistent. Ease of setup Rinse it once to remove any dust, pop it into a media bag, and place it after your mechanical stage (sponges/floss). That way, debris is caught before it reaches the Matrix, and the bacteria get clean, well‑oxygenated water. It works in small and large amounts—handy if you’re seeding a new tank or boosting capacity in an established one. Maintenance & longevity I only swish it in tank water when I’m doing a water change. No fancy routines or chemicals required. Because it lasts for years, it’s great value. You’re not constantly replacing media, so the cost evens out quickly—especially if you’re running multiple tanks like I am. Performance tips from my setups Don’t overpack the media bag; allow water to flow through freely. Keep a decent mechanical pre‑filter ahead of it. Less gunk on the Matrix means healthier bacterial colonies and less cleaning for you. It’s not a substitute for water changes, but it makes the system far more forgiving between services. Verdict Matrix is my go‑to for a reason: consistent results, low effort, and excellent durability. After trying plenty of alternatives, this is the one I trust across all four aquariums. For me, it’s the platinum standard of biological media—simple, effective, and worth every penny.
Review: A must have for a well established over populated tank - Just what I needed for my 105l tank setup,using this inside my Oase 350 thermo filter as ive got an over populated tank and wanted something that would thrive and keep the good bacteria going along with a good clean up crew this has made clean up less of a thing and only needing to do top ups. Would highly recommend and will be using in my next setups aswell.

## Features

- Use biocides safely. Always read the label and product information before use.
- High capacity bio filtration
- Controls ammonia, nitrite, and nitrate
- Supports aerobic and anaerobic bacteria species

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Pet Type | Fish |
| Product Dimensions | 20.32 x 20.32 x 19.05 cm; 2.31 kg |
| Item model number | 001051 |
| Item Form | Granules |
| Allergen Information | Gluten Free |
| Colour | Multi-colored |
| Size | 4 Litre |
| Volume | 4 Litres |
| Number of Items | 1 |
| Quantity | 1 |
| Specific Uses | Indoor |
| Batteries required | No |
| Batteries Included | No |
| External Testing Certification | Não aplicável |
| Item Weight | 2.31 kg |

## Product Details

- **Brand:** Seachem
- **Liquid volume:** 4 Litres
- **Item weight:** 2.31 kg
- **Item form:** Granules
- **Manufacturer:** Seachem

## Images

![Seachem Matrix Bio Media, 4 Litre - Image 1](https://m.media-amazon.com/images/I/61osvt6MSjL.jpg)
![Seachem Matrix Bio Media, 4 Litre - Image 2](https://m.media-amazon.com/images/I/61ApdScq2uL.jpg)
![Seachem Matrix Bio Media, 4 Litre - Image 3](https://m.media-amazon.com/images/I/71451jWid-L.jpg)
![Seachem Matrix Bio Media, 4 Litre - Image 4](https://m.media-amazon.com/images/I/91jeA34RsiL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Platinum Standard Bio Media!
*by P***O on 15 January 2026*

I use Matrix across all four of my aquariums, and it’s become my “buy once, trust always” biological media. It’s reliable, easy to use, and delivers the same steady performance no matter which filter I drop it into—canister, HOB, internal, or a sump basket. What I notice in day‑to‑day use The fish stay happy and the water stays stable. Matrix gives beneficial bacteria tons of room to colonise, which helps process waste efficiently and keeps parameters on an even keel. It’s properly “set and forget.” Once it’s in place, I don’t have to babysit it or swap it out every few months. A quick rinse in old tank water during maintenance is all it usually needs. It doesn’t crumble or compact like some ceramic rings. The pieces keep their shape, so flow through the media stays consistent. Ease of setup Rinse it once to remove any dust, pop it into a media bag, and place it after your mechanical stage (sponges/floss). That way, debris is caught before it reaches the Matrix, and the bacteria get clean, well‑oxygenated water. It works in small and large amounts—handy if you’re seeding a new tank or boosting capacity in an established one. Maintenance & longevity I only swish it in tank water when I’m doing a water change. No fancy routines or chemicals required. Because it lasts for years, it’s great value. You’re not constantly replacing media, so the cost evens out quickly—especially if you’re running multiple tanks like I am. Performance tips from my setups Don’t overpack the media bag; allow water to flow through freely. Keep a decent mechanical pre‑filter ahead of it. Less gunk on the Matrix means healthier bacterial colonies and less cleaning for you. It’s not a substitute for water changes, but it makes the system far more forgiving between services. Verdict Matrix is my go‑to for a reason: consistent results, low effort, and excellent durability. After trying plenty of alternatives, this is the one I trust across all four aquariums. For me, it’s the platinum standard of biological media—simple, effective, and worth every penny.

### ⭐⭐⭐⭐⭐ A must have for a well established over populated tank
*by T***A on 19 November 2025*

Just what I needed for my 105l tank setup,using this inside my Oase 350 thermo filter as ive got an over populated tank and wanted something that would thrive and keep the good bacteria going along with a good clean up crew this has made clean up less of a thing and only needing to do top ups. Would highly recommend and will be using in my next setups aswell.

### ⭐⭐⭐⭐⭐ Your fish will love it!
*by G***N on 23 November 2025*

Completely renewed my Fluval 407 filter with this, Fluval foam, extra ceramic rings and new carbon packs, the water quality is amazingly clear after only two days!

## Frequently Bought Together

- Seachem Matrix, 4 L / 1 gal.
- Fluval FX5 Fine Filter Water Polishing Pad - 3-Pack
- Seachem Indoor Purigen Organic Filtration Resin - Fresh and Saltwater 100 ml

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-03-11*