Seachem de-nitrateThe material has a high surface area and supports a high density of bacteria and although it has capacity to trap nitrate, de nitrate as with other nitrate retaining materials, such as certain zeolites and synthetic resins, is quite limited and the primary mechanism of nitrate removal is anaerobic. Live rocks or reef rocks remove nitrate by anaerobic denitrification. de nitrate removes nitrate by the same process. Efficiency is magnified several folds
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