Seachem De-Nitrate is an economical, natural, porous material with a pore distribution and geometry that promotes both aerobic nitrification within the first few millimeters of depth and anaerobic denitrification at the core. The material has a high surface area and supports a high density of bacteria.
Seachem 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 100 US gallons per hour), it will function solely as an aerobic filter. At slow flow rates (less than 50 US gallons per hour), it will function as both an aerobic filter and an anaerobic denitrifying filter.
For best results, Seachem De-Nitrate 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 (50 US gallons) per hour. If higher flow rates are unavoidable, use Matrix or Pond Matrix. It is best to rinse off dust before use.
Once Seachem De-Nitrate has been in use for several days, nitrate concentrations should start to fall and level off gradually at a concentration of about 4 mg/L as nitrate. As long as nitrate concentrations remain under control, the product is not exhausted.
Each 500 mL of Seachem De-Nitrate treats about 10000 L (250 US gallons), depending on initial nitrate concentration and the current biological load.
Enough should be used to remove nitrate at a rate at least as fast as the rate of formation. If very high nitrates are initially present, they should be brought down to less than 20 mg/L with water changes.