Is this stuff the same as pumice?

As Matthew M suggested, I looked at the data sheet. 100% pumice by weight. The data sheet gives a Chemical Abstracts Service number (CAS#) for it, and that is 1332-09-8. Google that number.

do you need to keep this in a bag or in the tray in my cascade canister filter?

It can be placed in your tray. it is loose. Might want to make sure you use a tray for the canister that has the lid on it.

Does it work the same way as the ceramic bio rings?

A million times better. The ceramic rings are trash. This has a lot more surface area because of the small cavaties in each piece. This stuff is fantastic for your bacteria.

I have a Magnum 350 filter which has a canister that has charcoal on the inside and a foam sleeve outside. Do I use this to replace the charcoal?

No, charcoal is a chemical filter. Matrix is a biological filter.If you did not need chemical filtering in your system, you could repurpose the Magnum 350 as a bio-filter by replacing the carbon with Matrix. This would help control ammonia/nitrites/nitrates at the expense of controlling organic pollutants.

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Seachem Matrix Bio Media 1 Liter

Product ID: 2271706

Details

Brand
Seachem
Item Form
Solid
Item Weight
1.67 Pounds
Liquid Volume
1 Liters
Number of Packs
1

🧬Maximized surface area for bacteria colonization

♻️Supports full nitrogen cycle: nitrification & denitrification

🇺🇸Proudly made in the USA

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Description

♻️ Transform your aquarium’s ecosystem with nature’s ultimate biofilter!

TRUSTED PROVEN - Backed by thousands of 5-star reviews and crafted by Seachem, a leader in aquatic health solutions.
BIOFILM POWERHOUSE - Engineered porous matrix offers unparalleled surface area for beneficial bacteria growth, ensuring crystal-clear water.
VOLUME BASED PRECISION - Sold by volume, not weight, to provide consistent filtration capacity regardless of moisture content.
NATURAL MINERAL VARIATION - Authentic mined media with unique color and texture variations, guaranteeing genuine quality and performance.
COMPLETE NITROGEN CYCLE SUPPORT - Facilitates both aerobic and anaerobic bacteria, reducing harmful ammonia, nitrite, and nitrate buildup naturally.

Seachem Matrix Bio Media is a premium, USA-made natural filtration substrate designed to maximize beneficial bacteria colonization. Its unique porous structure supports both aerobic and anaerobic bacteria, enabling a complete nitrogen cycle that reduces ammonia, nitrite, and nitrate levels for healthier aquatic environments. Sold by volume with natural mineral variations, it’s a trusted choice among aquarium professionals and enthusiasts alike.

Specifications

ASIN	B0002A5VIO
ASIN	B0002A5VIO
Allergen Information	Gluten Free
Best Sellers Rank	#22,033 in Pet Supplies ( See Top 100 in Pet Supplies ) #188 in Aquarium Filter Accessories
Brand Name	Seachem
Customer Reviews	4.8 4.8 out of 5 stars (2,988)
Date First Available	April 14, 2008
Department	Unisex-Adult
Global Trade Identification Number	00000116011709
Included Components	all
Is Discontinued By Manufacturer	No
Item Form	Solid
Item Type Name	Aquarium Filtration Media
Item Weight	1.67 Pounds
Item model number	117
Liquid Volume	1 Liters
Manufacturer	Seachem Laboratories, Inc.
Manufacturer	Seachem Laboratories, Inc.
Manufacturer Part Number	117
Model Number	117
Pet Type	Fish
Product Dimensions	7.9 x 3.7 x 3.7 inches; 1.67 Pounds
Target Species	Fish
UPC	000116011709 716184580831
Unit Count	1 Pounds
Warranty Description	Warranty

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€ 52.89

Duties & taxes included

In stock

Sold byAmazon BelgiumDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Belgium.

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TrustScore 4.5 | 7,300+ reviews

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