We recommend Crystal Quest CQE-RC-04020 Nitrate Water Filter Cartridge 20x2.5 inches
. Standard 20"x 2.5" Nitrate Removal Filter Cartridge. Contains special nitrate-selective resin. Nitrate reduction is 90% to 95% and breakthrough is not affected by sulfate levels. Optimum performance is achieved at 0.5 GPM (gallon per minute). Be aware, that the higher the flow rate, the less nitrates will be removed from water. The cartridge capacity is 22700 ppm of nitrates as NO3. This cartridge can be regenerated using sodium chloride brine. Nitrate Removal Filter Cartridge features: * Capacity :1,330 grains or 22,700 ppm * Design (nominal) flow rate: 0.5 GPM * Maximum temperature: 100 F (38 C) * Minimum temperature: 40 F (5 C) * Maximum pressure: 125 PSI (8.6 bar) * Minimum pressure: 20 PSI (1.4 bar) * Micron rating: 5 nominal How long will my filter last? To calculate capacity, first calculate the ppm (mg/L) of nitrates, then divide 22700 ppm by that number to get the gallons. Resin is manufactured in USA.
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