Matrix, 500 mL /17 oz

This is basically a very porous rock (pumice, I believe) that houses a lot of bacteria to process toxic Ammonia and Nitrites and (some) Nitrates. I considered buying pumice and using that instead but then you don't know what chemicals are used and this is fish tank safe so I went this route. I used this in my 29 gallon Aqueon saltwater tank in a hang on back Coralife Marine Filter with Protein Skimmer. It worked well and I had no issues with Ammonia and Nitrites. I used this in conjunction with Seachem Stability and added a clownfish from day 1 with no problems. I stopped using it though when I realized that I had enough porous rocks in my display to handle the bioload and repurposed the space in the hang on back for other things. Some people use this in a Quarantine tank but I think using a sponge and disposing is the safer route. I believe this is a solid product for Freshwater tanks and the larger pond version for larger tanks and ponds, but not as useful for Marine tanks with enough live rock. My batch came with some black obsidian and I emailed Seachem about it and they sent me a generous bag of Matrix to make up for it. Great customer support!

I added this in my canister filter in with the media that came with it, along with some purigen and my tank that had some issues getting my levels correct, cleared up quickly. My levels are and stay good now, as long I manage my water changes and cleanings pretty regular. It has helped cut my cleanings to every other week with 25% water changes. Love this stuff.

Seems to work well, I love purigen and was excited about this product because it can be put into my filter canisters and HOB filters easier. I have the Eheim aquastyle aquariums and can put this into the filter media container.

Excelente marca para acuarofilia. Confiable

I've put Matrix in two canister filters now (a Fluval 406 on a 55-gallon and a 106 on a 10-gallon) and while I can't really say that it's the "best" biological media I can say that it certainly does what it's supposed to do. I've had terrific results with everything Seachem makes and the Matrix is no exception. I packed my media baskets full of the stuff and let it go to work. All the water tests have come out just as they're supposed to so I'm left to assume that it's doing its job and that bacteria is happy in its little home. Some may argue that Seachem is charging a premium for nothing more than pumice but ultimately I don't care what it is as long as it's working and it's clearly working.

Great product. I had a 14 gallon bio cube and tossed the bio balls and replaced it with matrix. After cycling the tank I added about ten mollies. I had two unexpected batches of mollies from other tanks and after a few weeks I put the fry into the biocube as well so that I had about 30 fish in total almost 2/3 of them were juvenile. Way overstocked! After two weeks I went to do a water change and was sure that I would find ammonia and nitrites through the roof. But I was quite surprised that ammonia and nitrites were negligible. I'm replacing all the ceramic tubes and bio balls and other media in all my other tanks with Matrix!

I use Matrix in my fish tanks, it does a great job. What is amazing is that it also works in my 55 gallon tank that holds two 6-inch red ear sliders. Turtles poop a lot! Some people say that a turtle tank can't be cycled, but mine is thanks to Matrix. I used the whole 500 mL bottle in my canister filter and I do 80% water changes once a week. Ammonia and nitrites stay at 0. Matrix is the best biological filter media out there.

In my humble opinion, it doesn't get much better than this. I started out using a 250 ml bottle of matrix in my canister filter along with the el cheapo ceramic noodles that typically come with a canister filter. After 6 months of having my African Cichlid tank fully stocked, I decided to upgrade the media and so happy I did. Water parameters are outstanding.