{"product_id":"seachem-denitrate-500ml","title":"denitrate 500 ml — Biomedia Natural Anaerobic Denitrification | Seachem","description":"\u003cp\u003e Seachem denitrate 500 ml is a natural, porous, and economical biomedia whose pore distribution and geometry promote both aerobic nitrification in the first few millimeters of depth and anaerobic denitrification at the core of the medium. It removes nitrates through the same process as live rock, but with significantly greater efficiency by forcing water to filter through its porous structure. Unlike sulfur-based media, it does not produce hydrogen sulfide.\u003c\/p\u003e\n\n\n\u003ch2\u003e Main advantages\u003c\/h2\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Natural anaerobic denitrification — removes nitrates like live rock, with superior efficiency\u003c\/li\u003e\n\n\u003cli\u003e Dual function: aerobic nitrification (ammonia, nitrites) + anaerobic denitrification (nitrates)\u003c\/li\u003e\n\n\u003cli\u003e High surface area and high bacterial density — porous natural material\u003c\/li\u003e\n\n\u003cli\u003e No danger from hydrogen sulfide — unlike sulfur-based media\u003c\/li\u003e\n\n \u003cli\u003eNever runs out — permanent biomedia, requires no replacement\u003c\/li\u003e\n\n\u003cli\u003e Economical — a natural material at an affordable price\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003ch2\u003e Use in reef and marine aquariums\u003c\/h2\u003e\n\n\u003cp\u003e Denitrate works thanks to its porous structure: oxygen is consumed by aerobic bacteria on the surface, creating anaerobic conditions at the core of the media where denitrifying bacteria remove nitrates. Flow rate is critical for denitrification: at flow rates below 200 L\/h (50 US gallons\/h), denitrate functions as both an aerobic and anaerobic denitrifying filter. At flow rates above 400 L\/h (100 US gallons\/h), it functions only as an aerobic filter. If high flow rates are unavoidable, use Seachem Matrix or Pond Matrix, which support denitrification at higher flow rates.\u003c\/p\u003e\n\n\n\u003ch2\u003e Instructions for use\u003c\/h2\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e Rinse off the dust before use\u003c\/li\u003e\n\n \u003cli\u003ePlace in a cartridge filter, chemical filtration module, box filter, or media reactor\u003c\/li\u003e\n\n\u003cli\u003e The flow rate must not exceed 200 L\/h (50 US gallons\/h) for denitrification.\u003c\/li\u003e\n\n\u003cli\u003e After a few days of use, nitrate levels should begin to decrease and stabilize at around 4–5 mg\/L\u003c\/li\u003e\n\n\u003cli\u003e As long as nitrates remain under control, the product is not exhausted.\u003c\/li\u003e\n\n\u003cli\u003e Pre-filter the water with foam or cotton wool before adding the denitrate to prolong its lifespan.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003ch2\u003e denitrate vs Matrix\u003c\/h2\u003e\n\n\u003cp\u003e Both denitrate and Matrix are biomedia that support denitrification, but with different applications. Denitrate is smaller (gravel-sized) and more efficient per volume for nitrate reduction at low flow rates (less than 200 L\/h), making it ideal for use in a dedicated reactor. Matrix is ​​larger (10 mm) and supports denitrification at higher flow rates, making it ideal for use in a canister or sump. Both are permanent and do not require replacement.\u003c\/p\u003e\n\n\n\u003ch2\u003e Interview\u003c\/h2\u003e\n\n \u003cp\u003eNitrate doesn't run out but can become clogged with debris and biofilm. Pre-filtering the water upstream with foam or filter floss significantly extends its lifespan. Rinse periodically with aquarium water if necessary.\u003c\/p\u003e\n\n\n\u003ch2\u003e Available formats\u003c\/h2\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e 100 ml\u003c\/li\u003e\n\n\u003cli\u003e 250 ml\u003c\/li\u003e\n\n\u003cli\u003e 500 ml\u003c\/li\u003e\n\n\u003cli\u003e 1 L\u003c\/li\u003e\n\n\u003cli\u003e 2 L\u003c\/li\u003e\n\n\u003cli\u003e 4 L\u003c\/li\u003e\n\n\u003cli\u003e 20 L\u003c\/li\u003e\n\n\u003cli\u003e 100 L\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003ch2\u003e Why choose denitrate from ReefSolution?\u003c\/h2\u003e\n\n\u003cp\u003e The 500 ml denitrate is the ideal starting size for a low-flow denitrification reactor. Combine it with Seachem Matrix in the canister or sump for complete, high-flow biofiltration, and use Seachem Stability to accelerate bacterial colonization. Monitor your nitrate levels with the Salifert Nitrate Test Kit or the Hanna Nitrate Checker.\u003c\/p\u003e\n\n\n\u003ch2\u003e Frequently Asked Questions\u003c\/h2\u003e\n\n\n\u003ch3\u003e What is the difference between denitrate and Matrix?\u003c\/h3\u003e\n\n \u003cp\u003eThe denitrate is smaller and more efficient per volume for low-flow denitrification (less than 200 L\/h), ideal for use in a dedicated reactor. The Matrix is ​​larger and supports denitrification at higher flow rates, ideal for use in a canister or sump. Both are permanent biomedia.\u003c\/p\u003e\n\n\n\u003ch3\u003e What flow rate is needed for the denitrate to remove nitrates?\u003c\/h3\u003e\n\n\u003cp\u003e The flow rate should not exceed 200 L\/h (50 US gallons\/h) for anaerobic denitrification. Above 400 L\/h, the denitrate unit functions only as an aerobic filter (ammonia and nitrites only). A media reactor with a low-flow pump is the optimal setup.\u003c\/p\u003e\n\n\n\u003ch3\u003e Does the denitrate need to be replaced?\u003c\/h3\u003e\n\n\u003cp\u003e No. It's a permanent biomedia that doesn't run out. It can get clogged with debris — pre-filter the water upstream and rinse periodically with aquarium water to maintain its effectiveness.\u003c\/p\u003e","brand":"Seachem","offers":[{"title":"Default Title","offer_id":38010512343211,"sku":"000116013307","price":14.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0513\/7108\/1899\/products\/22328.jpg?v=1773621091","url":"https:\/\/reefsolution.com\/en\/products\/seachem-denitrate-500ml","provider":"Aquarium ReefSolution inc.","version":"1.0","type":"link"}