---
product_id: 5570170
title: "Matrix, 4 L / 1 gal."
brand: "seachem"
price: "VT31888"
currency: VUV
in_stock: true
reviews_count: 8
category: "Seachem"
url: https://www.desertcart.vu/products/5570170-matrix-4-l-1-gal
store_origin: VU
region: Vanuatu
---

# Porous for aerobic & anaerobic bacteria 170+ sq ft surface/liter Fits any filter, excels in canister Matrix, 4 L / 1 gal.

**Brand:** seachem
**Price:** VT31888
**Availability:** ✅ In Stock

## Summary

> 🧬 Transform your aquarium’s ecosystem with the ultimate bio media powerhouse!

## Quick Answers

- **What is this?** Matrix, 4 L / 1 gal. by seachem
- **How much does it cost?** VT31888 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/5570170-matrix-4-l-1-gal)

## 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

- • **Proven Long-Term Stability:** Durable media that maintains effectiveness over years, reducing maintenance frequency and water changes.
- • **Dual-Action Nitrate Control:** Unique porous structure supports anaerobic bacteria that actively reduce nitrates, not just ammonia and nitrites.
- • **Trusted by Aquarists Worldwide:** 4.8-star rating from 1,500+ reviews proves it’s the go-to bio media for demanding freshwater and marine tanks.
- • **Universal Filter Compatibility:** Seamlessly integrates into any filter system, with exceptional performance in canister filters.
- • **Maximize Biofiltration Efficiency:** Over 170 sq ft surface area per liter fuels explosive beneficial bacteria growth.

## Overview

Seachem Matrix is a premium, highly porous bio filter media designed to provide over 170 square feet of surface area per liter, supporting both aerobic and anaerobic beneficial bacteria. This dual-action filtration efficiently controls ammonia, nitrite, and nitrate levels in freshwater and marine aquaria. Compatible with all filter types, especially canister filters, it offers long-lasting durability and proven results, making it the top choice for serious aquarists seeking superior water quality and reduced maintenance.

## Description

Seachem Matrix, 4 L / 1 gal.

Review: ITS QUITE SIMPLY THE BEST BIO MEDIA, AND I WILL EXPLAIN WHY AND SHOW RESULTS - I have used Seachem Matrix for well over a year now, and I can say for a fact that it is by far the best media out there, and the results I have had using it prove it. Every bio media will give your filter the surface area to grow aerobic beneficial bacteria that convert ammonia and nitrites into nitrates. What's so special about Matrix is that each piece of the bio media is so porous yet dense that there are nooks and crannies in each piece that a special type of beneficial bacteria is able to grow, specifically anaerobic bacteria. This anaerobic bacteria consumes nitrates. This type of beneficial bacteria is one that can only grow in environments that are not oxygenated (which is why the porosity and nooks and crannies Matrix bring to the table are important). I keep African Cichlids (Mbuna specifically), which have a reputation for being some of the most demanding fish when it comes to bio load. I keep the tank stocked moderately, overfiltered, and chalked full of as much Seachem matrix as I can fit. Before switching to Matrix I was using the typical ceramic rings and doing weekly water changes. My Nitrates would get up to 30-40 PPM after 1 week with no ammonia and no nitrites. After switching to Seachem Matrix and giving the anaerobic beneficial bacteria a couple months to establish itself, it is a night and day difference. I test my water weekly. I was shocked to begin seeing a decline in the numbers on my nitrate tests. Probably around the 6 month mark or so, there began to be such a little amount of nitrates that I could skip water changes. I keep everything recorded in a spreadsheet and there was one point that I went 2.5 weeks without a water change and my nitrates were only at 25 PPM, KEEP IN MIND THESE ARE FULL SIZE MBUNA WITH NO PLANTS IN THE TANK. I still do weekly water changes and test my water weekly, but typically there is so little nitrates that it wont even register on a dip test strip and API registers between 0 and 5 PPM. Truly amazing. The proof is in the pudding, Seachem Matrix makes big claims and much like every other Seachem product, it backs them up. 10/10 would recommend, I will never run another bio media in any tank.
Review: Matrix is very effective at housing all of that good bacteria a filter needs to work. - I’ve been using Matrix for around ten years. It works extremely well, and holds up over time. I do keep it in mesh bags inside of my filters. I can’t imagine cleaning a filter without using the mesh bag, for easy removal and rinsing. I’ve been working on a new garden pond and decided to give matrix a go in place of the commonly used lava rock. Clearly a large amount is needed so I started price hunting these 1 gallon matrix tubs. This was the best priced I found. I like to buy from my LFS but the price was nearly double. Everything arrived in perfect condition, and as expected.

## Features

- Premium Natural Bio filter Support Media For Controlling Ammonia Nitrite And Nitrate In Freshwater And Marine Aquaria
- Highly Porous Media Designed To Provide Exceptionally Efficient Bio filtration For Single Site Removal Of Ammonia Nitrite And Nitrite
- Each liter of Matrix provides over 170 square feet of surface equivalent to over 10 gallons of typical plastic ball media
- Matrix May Be Placed In Any Kind Of Filter And Is Particularly Effective In A Canister Filter

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Seachem |
| Customer Reviews | 4.8 out of 5 stars 1,547 Reviews |
| Item Form | Granules |
| Item Weight | 5.1 Pounds |
| Liquid Volume | 4 Liters |
| Manufacturer | Seachem Laboratories, Inc. |
| UPC | 000116091107 000116011907 |

## Product Details

- **Brand:** Seachem
- **Item Form:** Granules
- **Item Weight:** 5.1 Pounds
- **Liquid Volume:** 4 Liters
- **Manufacturer:** Seachem Laboratories, Inc.

## Images

![Matrix, 4 L / 1 gal. - Image 1](https://m.media-amazon.com/images/I/61osvt6MSjL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ ITS QUITE SIMPLY THE BEST BIO MEDIA, AND I WILL EXPLAIN WHY AND SHOW RESULTS
*by A***R on March 18, 2023*

I have used Seachem Matrix for well over a year now, and I can say for a fact that it is by far the best media out there, and the results I have had using it prove it. Every bio media will give your filter the surface area to grow aerobic beneficial bacteria that convert ammonia and nitrites into nitrates. What's so special about Matrix is that each piece of the bio media is so porous yet dense that there are nooks and crannies in each piece that a special type of beneficial bacteria is able to grow, specifically anaerobic bacteria. This anaerobic bacteria consumes nitrates. This type of beneficial bacteria is one that can only grow in environments that are not oxygenated (which is why the porosity and nooks and crannies Matrix bring to the table are important). I keep African Cichlids (Mbuna specifically), which have a reputation for being some of the most demanding fish when it comes to bio load. I keep the tank stocked moderately, overfiltered, and chalked full of as much Seachem matrix as I can fit. Before switching to Matrix I was using the typical ceramic rings and doing weekly water changes. My Nitrates would get up to 30-40 PPM after 1 week with no ammonia and no nitrites. After switching to Seachem Matrix and giving the anaerobic beneficial bacteria a couple months to establish itself, it is a night and day difference. I test my water weekly. I was shocked to begin seeing a decline in the numbers on my nitrate tests. Probably around the 6 month mark or so, there began to be such a little amount of nitrates that I could skip water changes. I keep everything recorded in a spreadsheet and there was one point that I went 2.5 weeks without a water change and my nitrates were only at 25 PPM, KEEP IN MIND THESE ARE FULL SIZE MBUNA WITH NO PLANTS IN THE TANK. I still do weekly water changes and test my water weekly, but typically there is so little nitrates that it wont even register on a dip test strip and API registers between 0 and 5 PPM. Truly amazing. The proof is in the pudding, Seachem Matrix makes big claims and much like every other Seachem product, it backs them up. 10/10 would recommend, I will never run another bio media in any tank.

### ⭐⭐⭐⭐⭐ Matrix is very effective at housing all of that good bacteria a filter needs to work.
*by A***A on October 1, 2025*

I’ve been using Matrix for around ten years. It works extremely well, and holds up over time. I do keep it in mesh bags inside of my filters. I can’t imagine cleaning a filter without using the mesh bag, for easy removal and rinsing. I’ve been working on a new garden pond and decided to give matrix a go in place of the commonly used lava rock. Clearly a large amount is needed so I started price hunting these 1 gallon matrix tubs. This was the best priced I found. I like to buy from my LFS but the price was nearly double. Everything arrived in perfect condition, and as expected.

### ⭐⭐⭐⭐⭐ Best filter media on the market.
*by C***C on September 15, 2025*

Excellent filter media. I used two gallons of this media in my new setup and it helped with my water quality and allowed for the quick addition of fish.

## 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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.vu/products/5570170-matrix-4-l-1-gal](https://www.desertcart.vu/products/5570170-matrix-4-l-1-gal)

---

*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-02-25*