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

🧪1 Liter bio filtration volume

⚖️Lightweight 1.67 lbs

🇺🇸Made in USA quality

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Description

🌊 Elevate your aquarium’s health with Seachem Matrix — where science meets pristine water clarity!

GLUTEN FREE SAFE - Non-toxic, allergen-free solid media that’s safe for all fish species.
COMPACT EFFICIENT DESIGN - Optimized 1-liter volume fits seamlessly into most filtration systems without bulk.
SUPERIOR BIOLOGICAL FILTRATION - Enhance your aquarium’s ecosystem with premium bio media that supports beneficial bacteria growth.
TRUSTED AMERICAN CRAFTSMANSHIP - Proudly made in the USA, ensuring consistent quality and reliability.
PROVEN PERFORMANCE POPULARITY - Highly rated with 4.8 stars from nearly 3,000 aquarists—join the community of satisfied pros.

Seachem Matrix Bio Media is a 1-liter solid filtration media designed to foster beneficial bacteria growth, improving aquarium water quality. Made in the USA, it weighs 1.67 pounds and fits most filtration systems. With a 4.8-star rating from thousands of users, it’s a trusted choice for professional and hobbyist aquarists 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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