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Your cart is empty.Matrix is a highly porous media designed to provide exceptionally efficient bio filtration for single site removal of ammonia, nitrite, and nitrate from freshwater, marine, and reef aquaria. Each liter of Matrix provides over 160,000 cm2 (170 sq. ft.) of surface, equivalent to over 40 L (10 gallons) of typical plastic ball media! This product is sold by volume. Cited weight is minimal weight. Matrix is a naturally mined, chemically inert material for facilitating the growth of biological filtration in aquarium and pond systems. Due to its organic nature - size, shape, coloration, and density of the Matrix material will vary slightly between packages. Any of these variants and small irregularities in sizing are perfectly natural and WILL NOT affect the integrity of the product OR its ability to maintain water quality. It will also not affect pH in the system.
Customer
Reviewed in the United States on February 28, 2025
Works great
Adam
Reviewed in Canada on October 25, 2024
Product arrived as described. Very little powder and very few garbage stones. My thermo 600 took all x4l. Will update x4 months from now on performance changes. Replaced ceramic rings and sintered glass bio balls from Ehiem. Make sure u wash thoroughly and soak for 24hrs to keep the floaters to a min. Update; working well in my 600, all my values are 0 and the water is crystal clear with just a little yellow due to wood in tank. All x4l went into my 600, flow is good with the 45ppi ring sponges on pre filter. Taken x7 weeks for these results. PH is stable at 7 to 7.1 Great stuff but still expensive!
ANDERSON JUSTINO DA SILVA
Reviewed in Brazil on September 22, 2023
Meu aquário tem 6 litros. 4L é Matrix.... eeeee brincadeira.Balde com tampa.Granolometria excelente.Pedaços de uma rocha escura tb
Omar Alali
Reviewed in the United Arab Emirates on August 20, 2023
ممتاز
Thebeardedvet
Reviewed in the United States on March 26, 2023
Matrix is a high-porosity biological filter media designed for aquarium filtration. Matrix has a vast internal pore network that provides surface area for the attachment of beneficial bacteria. Porosity and high surface area alone should be the measure of biomedia.Matrix has a primarily macroporous internal pore structure. This means the pores are large enough for the bacteria to enter and form stable colonies. Large surface area measurements sound impressive but if the pores are too small the bacteria cannot get in and colonize the media. This means the bacteria can only grow on the unprotected surface of the biomedia. The colonies are vulnerable to washout caused by high velocity “microshear,†which is the scrubbing effect of water flowing over smooth surfaces.Seachem Matrix protects nitrifying bacteria inside the porous network so the colonies remain undisturbed. But there’s more. Under the right conditions natural denitrification can occur, lowering nitrate levels without the need for a special de-nitrification filter. Matrix provides the right microenvironment that allows nitrification and natural denitrification to take place in the same filter.Seachem Matrix will remove ammonia, nitrite and nitrate! Matrix can be used in any power filter, canister filter, contactor or filter sump. Matrix never needs replacing and can be rinsed if it becomes dirty.
amazonuser
Reviewed in the United States on March 18, 2023
I have used Seachem Matrix for well over a year now, and I can say for a fact that it is by far the best media out there, and the results I have had using it prove it.Every bio media will give your filter the surface area to grow aerobic beneficial bacteria that convert ammonia and nitrites into nitrates. What's so special about Matrix is that each piece of the bio media is so porous yet dense that there are nooks and crannies in each piece that a special type of beneficial bacteria is able to grow, specifically anaerobic bacteria. This anaerobic bacteria consumes nitrates. This type of beneficial bacteria is one that can only grow in environments that are not oxygenated (which is why the porosity and nooks and crannies Matrix bring to the table are important).I keep African Cichlids (Mbuna specifically), which have a reputation for being some of the most demanding fish when it comes to bio load. I keep the tank stocked moderately, overfiltered, and chalked full of as much Seachem matrix as I can fit. Before switching to Matrix I was using the typical ceramic rings and doing weekly water changes. My Nitrates would get up to 30-40 PPM after 1 week with no ammonia and no nitrites. After switching to Seachem Matrix and giving the anaerobic beneficial bacteria a couple months to establish itself, it is a night and day difference. I test my water weekly. I was shocked to begin seeing a decline in the numbers on my nitrate tests. Probably around the 6 month mark or so, there began to be such a little amount of nitrates that I could skip water changes. I keep everything recorded in a spreadsheet and there was one point that I went 2.5 weeks without a water change and my nitrates were only at 25 PPM, KEEP IN MIND THESE ARE FULL SIZE MBUNA WITH NO PLANTS IN THE TANK. I still do weekly water changes and test my water weekly, but typically there is so little nitrates that it wont even register on a dip test strip and API registers between 0 and 5 PPM. Truly amazing.The proof is in the pudding, Seachem Matrix makes big claims and much like every other Seachem product, it backs them up. 10/10 would recommend, I will never run another bio media in any tank.
Jan Jaegholm
Reviewed in Sweden on October 21, 2023
Köpte detta då det skulle fungera mot Nitrit vilket inte mycket gör. Har 2 filter ett JBL 1900e på mitt 720L akvarium och ett Aquael 2000 på mitt 450L + några filter till på dessa. Efter ca 4 månader hade jag knappt någon nitrit alls inför vattenbytet jag gör var 14 dag. Innan var Nitrit halten strax under 50 nu under 20. Bra produkt som gör det den lovar med ge den lite tid att etablera rätt bakterieflora.
George A. Schmid
Reviewed in the United States on November 19, 2022
This is, by far, the best filter media you can buy. Tons of little nooks and crannies allow billions of bacteria to colonize and digest all your ammonia and nitrites. Because the bacteria can literally colonize deep inside each piece of Matrix, some anaerobic bacteria are able to gain a foothold. These definitely take a bit longer to establish, about six months. But they digest your nitrates! So depending on your load factor, you can definitely reduce the number of water changes and maybe even practically eliminate the need for water changes to rid your tank of nitrates. There simply is no better, or even comparable, product out there.
Customer
Reviewed in Singapore on February 28, 2020
Excellent value and works . My second purchase.
Tony H.
Reviewed in the United States on May 19, 2015
I purchased the 1 gallon sized Matrix due to the cost savings when split with a friend. We each got 2L of Matrix for our canister filters.This filter media works very well. My water is clear. My water tests all show good values, with no signs of ammonia, nitrate or nitrites. All fish are happy and thriving. My planted tank is looking great!I can't say how this will work over years, but for the last 2.5 months, this has been doing its job and the fish are all thriving.Maintenance thus far has been a bi-weekly rinse out of my filter sponges, and for the first time, a quick shake and rinse of the basket full of Matrix. I didn't scrub or do anything to remove more than the loose sludge that was sitting on the media. My sense is the less you do in disturbing the good bacteria, the better. Just need to clean out the gunk to allow for good water flow.I had some extra and added it to my son's 3 gallon tank filter. I can't say it's changed the world, but I would think it's helping in keeping those fish happy too.
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