How is this used exactly? is it genuinely effective at reducing nitrate levels? my ammonia and nitrite levels are a perfect 0ppm. thank you!

Yes it does work I used it for months without an issue. My levels reduced as tap water was high I got a 75% reduction but don’t take that as you will get the same results

I have a sponge filter (shrimp tank) with nowhere to put this in the filter. Can I just put it directly into the tank?

Yes although it's not ideal. Generally bacterial media is kept free of stritus by mechanical filter media, you can't do that if it's lose in the tank. If you have choice I'd certainly give it a go and see how it works.

May I put 4l in a fluval fx6 to replace filter media ?

I tried this about 12 months ago not worth the money at all didn’t make much difference to my water quality and most the media is hard grey stone which is basically just stone and has no use in your filter at all. My advice would be go with alphagrog e25 as it’s only £23 for 20 kg and is much better I now have a mix of alphagrog and bio home ultimate and won’t look back. This is just my opinion good look with what ever media you choose to go with

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Seachem Matrix Bio Media, 1 Litre

Product ID: 48995660

Details

Brand
Seachem
Item form
Solid
Item weight
757 g
Liquid volume
1 Litres
Number of Packs
1

💧Controls ammonia, nitrite & nitrate

🧬Massive surface area for bacteria colonization

♻️Supports aerobic & anaerobic bacteria

E£ 4517

Duties & taxes included

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Description

🧪 Elevate your aquarium’s ecosystem with the platinum standard in bio media!

DUAL BACTERIA SUPPORT - Nurtures both aerobic and anaerobic bacteria for complete nitrogen cycle control
EFFORTLESS MAINTENANCE - Set-and-forget media that only needs a quick rinse during water changes
LONG LASTING DURABILITY - Doesn't crumble or clog, ensuring consistent water flow and performance
UNIVERSAL COMPATIBILITY - Fits perfectly in all filter types—canister, HOB, internal, or sump baskets
ULTIMATE BIOFILTRATION POWER - Packed with thousands of microscopic pores for max bacteria growth

Seachem Matrix Bio Media is a 1-litre high-capacity biological filtration media designed to optimize aquarium water quality by supporting beneficial aerobic and anaerobic bacteria. Its unique porous structure maximizes surface area for bacteria colonization, effectively controlling ammonia, nitrite, and nitrate levels. Durable and easy to maintain, it fits all filter types and ensures stable, crystal-clear water for a healthy aquatic environment.

Specifications

ASIN	B0002A5VIO
Allergen Information	Gluten Free
Best Sellers Rank	5,976 in Pet Supplies ( See Top 100 in Pet Supplies ) 67 in Aquarium Water Treatments
Brand Name	Seachem
Country Of Origin	USA
Customer Reviews	4.7 4.7 out of 5 stars (6,979)
Global Trade Identification Number	00000116011709
Included Components	All
Item Form	Solid
Item Type Name	Aquarium Filtration Media
Item Weight	757 g
Liquid Volume	1 Litres
Manufacturer	Seachem
Manufacturer Part Number	117
Model Number	117
Number of Items	1
Number of Packs	1
Pet Type	Fish
Target Species	Reptile
UPC	000116011709 716184580831
Unit Count	1000.0 millilitre

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TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

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