De nitrate is an economical, natural, porous material with a pore distribution and geometry that promotes both aerobic nitrification within the first few mm of depth and anaerobic denitrification at the core. The material has a high surface area and supports a high density of bacteria.

Why It's Different

"Live" rocks or reef rocks remove nitrate by anaerobic denitrification. de nitrate removes nitrate by the same process. Efficiency is magnified several folds by forcing the water to filter through the porous de nitrate. As with reef rock, anaerobic conditions are achieved by the porosity and the depletion of oxygen by the aerobic process at the surface. Excessive flow rates should, therefore, be avoided, as they may impede development of an adequate anaerobic environment to support denitrifying bacteria. de nitrate is also an excellent media for aerobic nitrification and it makes an ideal biological filter in drip trays, canister filters, sumps, or even box filters. At high flow rates (greater than 400L p/h), it will function solely as an aerobic filter. At slow flow rates (less than 200L p/h), it will function as both an aerobic filter and an anaerobic denitrifying filter.

Directions For best results, denitrate should be placed to assure the flow of water through it, such as in a canister filter, chemical filtration module, or box filter. Flow rate should not exceed 200 L per hour. Once denitrate has been in use for several days, nitrate concentrations should start to fall and level off gradually at a concentration of about 4-5 mg/L as nitrate. Each 250 mL of de*nitrate treats about 50-100 L ,depending on initial nitrate concentration and the current biological load.

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