Description
Seachem De*nitrate 2L — Natural mineral filtration media for both aerobic and anaerobic nitrate reduction that operate in low-water-velocity aquariums
Seachem De*nitrate 2L (SKU: 724957-138) provides a high-volume natural porous stone media tailored for medium-to-large aquarium biological filtration systems. Designed to operate in low-water-velocity environments, it supports both aerobic bio-filtration on its outer shell and anaerobic denitrification deep inside its porous structure. This dual-zone bacterial support breaks down ammonia, nitrite, and persistent nitrate into non-toxic gas.
Unlike chemical resins that absorb limited quantities of nitrate before needing regeneration, De*nitrate provides a permanent biological housing unit that does not wear out over time. It is chemically inert, ensuring that water hardness and pH levels remain unchanged during continuous operation.
Usage & Application
When to Use
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Moderate to High Nitrate Control: Suitable for medium aquariums experiencing persistent nitrate buildup from high bioloads.
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Canister & Sump Integration: Houses effectively in slow-flow media reactors, canister filter trays, or internal filter chambers.
Placement & Flow Guide
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Secure media inside a fine mesh bag prior to placing in filter media chambers.
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Maintain water flow rate through the media under 200 L/h (50 US GPH) to sustain internal anaerobic zones.
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Use mechanical filter floss upstream to protect media pores from organic detritus accumulation.
Product Specifications & Highlights
Key Features
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Micro-Porous Stone Structure: Fosters beneficial aerobic and anaerobic bacterial colonies.
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Natural Nitrate Conversion: Converts nitrate into nitrogen gas via natural biological pathways.
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Permanent Bio-Support: Physical stone substrate does not exhaust or leach bound compounds.
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Aquatic Safe: Neutral mineral composition won’t shift pH or hardness parameters.
Product Details
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Brand: Seachem
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SKU: 724957-138 (Internal ID: 130706)
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Barcode (GTIN/UPC): 000116013802
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Product Type: Aquarium Filter Media / Biological Nitrate Reduction
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Package Dimensions: 120 mm (L) × 120 mm (W) × 240 mm (H)
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Gross Package Weight: 1,400 g
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Net Volume: 2,000 mL (2 Litres)
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Target Environment: Low-Flow Freshwater & Marine Filters
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Filtration Capacity: Treats up to 800 Litres (200 US gallons) at low water flow rates below 200 LPH





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