Seachem Matrix Bio Media 1 Liter

I received a few different color media but they were mostly white. Theres a good amount of different sizes too. I filled up the filter and used the rest as substrate. It can be cleaned and reused so why not? It looks great.

I purchased these in hopes of helping reduce my high tap water nitrate problem for my 75G. I used it for a good while but found that Id need more then I had space for. In order for it to properly remove nitrates. It ended up just being a good place for bacteria to live but not much more. This stuff has an expiration date becuase after awhile the pores that are supposed to help in the stone become clogged. Once they become clogged its not as efficient as it should be. Overall, Id recommend these to help lower nitrates but only if you have alot of it.

Great filter medium. Can be added to a hang on the back type filter or canister filter. Much more surface area for beneficial bacteria than ceramic bio rings or plastic bio balls.

I read about Seachem Matrix and I thought I would give it a try. Great product and it really helped give my tank the bio boost that it needed to keep Ammonia and Nitrites at 0 ppm. I have Matrix media in a plastic canister in my extra slot on my Penguin 200, and after about two weeks or so the aquarium settled down and my numbers and levels got in line. I did have to tap some of the big stones with a hammer to make them smaller so they fit just right, but that was fine. UPDATE: 09/22/2012 - Seachem Matrix still wotking. Added it to a canister filter and Ammonia and Nitrites are at proper levels. All one needs to do periodically is give them a good rinse in aquarium water and place them back into the canister filter.

This product allows me to fully pack some of the trays in my two Fluval 406 canister filters to provide maximum bio-filter capability for my 75 gallon tank that holds multiple 6 goldfish. With a tank setup like mine, there is a large amount of organic waste for the filters to process and this product does a great job for me. I find it works better than the cylinder shape products.

I just got my order in , I had read these come pretty dirty but man I dont know how many times you neeed to rinse them but I must have gone through 50 gallons of water to get them relatively clean, Seems like the agitation of moving them around to rinse them actually cause the stones to grind up creating more dust. I got them in my filter now. Thankfully didnt cloud up with any dust particles. When I soaked them in a bucket some actually floated. These are definitely super porous and am optimistic they will help improve my biofilter.

In all my many years of keeping fish, many have claimed to have products to bring down nitrate levels, but none worked. This is the first product I have found that actually does. And it is cheap. I did use it in my canister filters as opposed to hob, after reading the reviews. Seems some had mixed results that way. But I am amazed at the results I have gotten. It is not immediate, it took some weeks to see it drop, but after two weeks out Im at 10 ppm. Will buy again.

the 1L bottle was the perfect amount to fill up two baskets in my fluval 307. never have problems with amonia or nitrites in my tank so matrix gives ample area for beneficial bacteria

Its pumice stones but clean and works as well as other bio media. Would advise to rinse out the media once a month and replace one half each six months.

Unlike other reviews container was filled all the way to the top and only a few dark pieces. I still have half a bottle left filled up my Aquaclear70