{"product_id":"seachem-matrix-biomedia","title":"Seachem Matrix","description":"\u003cp\u003e\u003cstrong\u003eSeachem Matrix\u003c\/strong\u003e is a high-capacity biological filtration media that supports the beneficial bacteria which keep your aquarium safe and clear. Each liter provides over 700 square meters of surface area, as much as 170 liters of plastic bio-balls, packed into both the outer surface and a network of internal pores. Those deep pores create low-oxygen zones, so Matrix grows the aerobic bacteria that handle ammonia and nitrite plus the anaerobic bacteria that reduce nitrate, all in the same filter. It is inert, will not break down, and never needs replacing.\u003c\/p\u003e\n\u003cp\u003eRunning a Seachem Tidal filter? Grab the pre-portioned \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-tidal-matrix-biomedia\" style=\"color:#666;font-weight:600;text-decoration:underline;\"\u003eTidal Matrix\u003c\/a\u003e pouches instead. Otherwise hold this bulk Matrix in a reusable \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/weco-coarse-mesh-zipper-media-bag-4x8\" style=\"color:#666;font-weight:600;text-decoration:underline;\"\u003emesh media bag\u003c\/a\u003e, add \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-matrix-carbon\" style=\"color:#666;font-weight:600;text-decoration:underline;\"\u003eMatrix Carbon\u003c\/a\u003e for chemical filtration, or browse more \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/filter-media-cartridges\" style=\"color:#666;font-weight:600;text-decoration:underline;\"\u003efilter media and cartridges\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #666;padding-left:8px;\"\u003eWhat It Does\u003c\/h3\u003e\n\u003cul style=\"margin:0 0 8px;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnormous surface area.\u003c\/strong\u003e Over 700 square meters per liter gives beneficial bacteria far more habitat than plastic balls or ceramic rings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull nitrogen cycle.\u003c\/strong\u003e Handles ammonia and nitrite on the surface and reduces nitrate in the deep pores, all in one media.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControls nitrate.\u003c\/strong\u003e The oxygen-poor interior lets anaerobic bacteria convert nitrate to nitrogen gas, which most biomedia cannot do.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInert and permanent.\u003c\/strong\u003e It does not break down or leach and never needs replacing. Just rinse it when flow slows.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFreshwater and saltwater.\u003c\/strong\u003e Works in community tanks, planted setups, and reef systems alike.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits any filter.\u003c\/strong\u003e Use it in canisters, sumps, hang-on-back trays, or a media bag in almost any system.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #666;padding-left:8px;\"\u003eChoose Your Size\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 8px;\"\u003eSeachem recommends 250 mL of Matrix for every 50 US gallons. Step up for heavier stocking or extra nitrate control.\u003c\/p\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;margin:0 0 8px;font-size:0.95em;\"\u003e\n\u003cthead\u003e\u003ctr style=\"background:#f6f6f6;\"\u003e\n\u003cth style=\"border:1px solid #ddd;padding:6px 10px;text-align:left;\"\u003eSize\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ddd;padding:6px 10px;text-align:left;\"\u003eTreats up to\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ddd;padding:6px 10px;text-align:left;\"\u003eBest for\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e250 mL\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e50 gallons\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eNano and small tanks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e500 mL\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e100 gallons\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eStandard community tanks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e1 L\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e200 gallons\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eLarge tanks and canisters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e2 L\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e400 gallons\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eBig systems and sumps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e4 L\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e800 gallons\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003ePonds and multi-tank setups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #666;padding-left:8px;\"\u003eHow to Use\u003c\/h3\u003e\n\u003cul style=\"margin:0 0 8px;padding-left:20px;\"\u003e\n\u003cli\u003ePlace Matrix in your filter after the mechanical and chemical stages so debris is caught before it reaches the media.\u003c\/li\u003e\n\u003cli\u003eFor the best nitrate reduction, keep flow through the Matrix on the gentle side. Slower water lets the anaerobic bacteria work.\u003c\/li\u003e\n\u003cli\u003eRinse it in old tank water when flow slows, never in tap water, to preserve the bacteria. It never needs replacing.\u003c\/li\u003e\n\u003cli\u003eWhen adding it to an established tank, leave your existing media in place so the biological colony stays stable.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #666;padding-left:8px;\"\u003eRecommended Pairings\u003c\/h3\u003e\n\u003cul style=\"margin:0 0 8px;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-tidal-matrix-biomedia\" style=\"color:#666;font-weight:600;text-decoration:underline;\"\u003eSeachem Tidal Matrix\u003c\/a\u003e: the same media pre-bagged to drop into a Seachem Tidal filter\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/weco-coarse-mesh-zipper-media-bag-4x8\" style=\"color:#666;font-weight:600;text-decoration:underline;\"\u003eWeco Mesh Media Bag\u003c\/a\u003e: a reusable zipper bag to hold bulk Matrix in any filter\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-matrix-carbon\" style=\"color:#666;font-weight:600;text-decoration:underline;\"\u003eSeachem Matrix Carbon\u003c\/a\u003e: premium activated carbon for the chemical stage\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/filter-media-cartridges\" style=\"color:#666;font-weight:600;text-decoration:underline;\"\u003eFilter Media \u0026amp; Cartridges\u003c\/a\u003e: browse all media and cartridges\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #666;padding-left:8px;\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp style=\"margin:8px 0 2px;\"\u003e\u003cstrong\u003eHow much do I need?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0 0 8px;\"\u003eUse about 250 mL for every 50 US gallons. A heavier bioload or a nitrate problem is a good reason to add more.\u003c\/p\u003e\n\u003cp style=\"margin:8px 0 2px;\"\u003e\u003cstrong\u003eDoes it really lower nitrate?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0 0 8px;\"\u003eYes. The deep pores host anaerobic bacteria that reduce nitrate. Keep the flow through it gentle and give a new setup a few weeks to establish.\u003c\/p\u003e\n\u003cp style=\"margin:8px 0 2px;\"\u003e\u003cstrong\u003eDo I ever replace it?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0 0 8px;\"\u003eNo. Matrix is inert and permanent. Just rinse it in tank water when it clogs and it keeps working for the life of the tank.\u003c\/p\u003e\n\u003cp style=\"margin:8px 0 2px;\"\u003e\u003cstrong\u003eFreshwater or saltwater?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0 0 8px;\"\u003eBoth. Matrix is inert and performs the same in freshwater, planted, and marine tanks.\u003c\/p\u003e","brand":"Seachem","offers":[{"title":"250ml","offer_id":48289985265883,"sku":"116","price":4.18,"currency_code":"USD","in_stock":true},{"title":"500ml","offer_id":48289985298651,"sku":"113","price":7.07,"currency_code":"USD","in_stock":true},{"title":"1 L","offer_id":48289985331419,"sku":"117","price":12.75,"currency_code":"USD","in_stock":true},{"title":"2L","offer_id":48289985364187,"sku":"119","price":22.42,"currency_code":"USD","in_stock":false},{"title":"4 L","offer_id":48817066508507,"sku":"119","price":39.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/SC01130-1.png?v=1771620817","url":"https:\/\/squeakysaquatics.com\/products\/seachem-matrix-biomedia","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}