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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🧬 Elevate your aquarium’s ecosystem with Seachem Matrix Bio Media — where science meets serenity.

LEAK PROOF DESIGN - Secure lid clamp and rubber O-ring prevent messy leaks and maintain system integrity.
VIBRATION FREE STABILITY - Rubber feet absorb vibrations, keeping your setup steady and professional.
IDEAL FOR MID SIZED TANKS - Efficient 400 L/h flow with 5W UV output supports aquariums up to 180 liters.
WHISPER QUIET PERFORMANCE - Operate your aquarium without disruptive noise—peaceful for you and your fish.
MULTI LAYER FILTRATION POWER - Advanced bio-media ensures crystal-clear water and optimal aquatic health.

Seachem Matrix Bio Media is a 1-liter advanced biological filtration media designed for aquariums up to 180 liters. Featuring a multi-layer filtering system, quiet operation, and a leak-proof lid with rubber O-ring and clamp, it delivers a powerful 400 L/h flow rate with 5W UV output. Rubber feet reduce vibration, ensuring a stable and efficient filtration experience.

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Brand	Seachem
Liquid Volume	1 Litres
Item Weight	1.67 Pounds
Item Form	Liquid
Manufacturer	AQUATIC REMEDIES, AQUATIC REMEDIES , Reg. Off. #5, South Made Street, Kolathur , Chennai , Tamil Nadu-99 ; +91 7042836466
UPC	000116011709 716184580831
Global Trade Identification Number	00000116011709
Department	Unisex-Adult
Manufacturer	AQUATIC REMEDIES
Country of Origin	USA
Item model number	117
Product Dimensions	20.07 x 9.4 x 9.4 cm; 757.5 g
ASIN	B0002A5VIO

Seachem Matrix Bio Media, 1 L

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