Seachem Matrix Bio Media 250ml

It may not be the most surface area per cubic inch. Compared to newer products on the market. But its been time-tested. Its cheaper and easy to use ... No worries about leaching aluminum or other metals.

I have no idea whether this stuff actually works as it described.

I bought this and I dont see much results. I think Im going back to the usual dark charcoal filters.

Seachem...a trusted brand. After having a outdoor koi pond (with bio filtration) in California for many years, we had to move to indoor tanks in New England. However, I never really put much thought into the filter systems that come with todays starter tanks. After having a tank in my daughters room for years (one in which we periodically monitored water properties) we started to struggle to keep some of the fish alive. I decided to take a closer look at our water chemical levels and found we began to struggle with ammonia and nitrates again. It was then that really decided to shift away from the basic carbon filters that come for our specific filter - in which we always seem to throw away established bio filter. I decided that I would try filter padding with Purigen and Matrix - creating a bio filter that I wouldnt toss away each time I replaced the padding. The matrix stones are pumice based, giving them extreme surface area coverage where the bio filter bacteria can become established. I borrowed one of my wifes old nylons to create a flexible bag of matrix stones that was easy to add to the new filter set-up. My only complaint is the powdered dust that is all over the stones when you first open them. Even after a thorough rinsing, the tank became mildly cloudy when the stones were introduced. Within 12 hours that cloudiness was gone. And since using the Purigen/Matrix combo the two tanks have never been more stable and more clear!

Seems to help my tank, works great! Fish are happy!

Still new to this product.

I really like these they feel like good quality and look and feel very pourus. My water parameters have been good so I think its safe to assume these are working. Also its seachem, their known for reliable products.

I have used this in my 125 gal reef tank for two years in a 5 stage canister filter. I have two 304B canister filters and one of them is just totally full of this and it is working wonders for my tank! One of the best purchases I have made since Ive been in the saltwater/reefing hobby.

One of the best

meh