The Crystal Quest Nitrate Removal SMART Single Cartridge Countertop Water Filtration System is a point-of-use drinking water filter designed to sit on the countertop and connect to a compatible kitchen faucet. It uses a single replaceable cartridge with seven stages of filtration, including nitrate-selective resin, one-micron filter pads, Eagle Redox Alloy 6500 and 9500 media, ion exchange resin, and granular activated carbon. The nitrate-selective resin is listed for 90% to 95% nitrate reduction, with capacity depending on influent nitrate levels. This cartridge can be regenerated using sodium chloride brine, with regeneration needs varying by influent nitrate levels and use. With a listed 0.3–0.5 GPM flow rate, this countertop nitrate water filter is suitable for drinking water use in homes, apartments, offices, and spaces where countertop faucet-connected filtration is preferred.
This Crystal Quest system combines nitrate-selective resin with SMART filtration media inside one countertop cartridge. It is designed for point-of-use drinking water applications where nitrate reduction is a priority and a compact faucet-connected countertop system is preferred.
Water travels through pre and post one-micron filter pads, nitrate-selective resin, Eagle Redox Alloy 6500 and 9500 media, ion exchange resin, and granular activated carbon. These stages are designed to help reduce suspended particles, nitrates, chlorine, chloramine, bad taste, odors, and other contaminants listed by Crystal Quest when present in the water.
The nitrate cartridge can be regenerated using sodium chloride brine to help maintain performance. Regeneration timing varies based on influent nitrate level, water usage, and cartridge performance.
The system is available in white polypropylene or stainless steel housing options. The stainless steel model offers a more appliance-style countertop appearance.
This single-cartridge countertop filter is built for drinking water use where nitrate reduction and compact faucet-connected filtration are the priorities. It is suitable for kitchens, apartments, offices, and spaces where countertop faucet-connected filtration is preferred.
Choose the white polypropylene or stainless steel housing based on your counter space and appearance preferences. Both versions use the same single-cartridge countertop format and connect at the faucet with a diverter valve.
Need help choosing a nitrate countertop filter?
TrueStead Supply can help you compare housing material, faucet compatibility, and nitrate filtration needs.
✓ Single-cartridge countertop design
✓ Nitrate + SMART filtration stages
✓ Sodium chloride brine regeneration
| Brand | Crystal Quest |
| Product Type | Single cartridge countertop water filtration system |
| Filtration Focus | Nitrate removal + SMART filtration |
| Filtration Stages | 7 stages |
| Main Media Types | Nitrate-selective resin, one-micron filter pads, Eagle Redox Alloy 6500 and 9500 media, ion exchange resin, and granular activated carbon |
| Installation Type | Countertop, faucet-connected |
| Housing Options | White polypropylene or stainless steel |
| Polypropylene Housing | White polypropylene |
| Polypropylene Dimensions | 5" L × 13" H × 5" W |
| Stainless Steel Dimensions | 5.5" L × 13.5" H × 5" W |
| Nitrate Reduction | 90% to 95%, based on listed source conditions |
| Nitrate Cartridge Capacity | 3000 ppm nitrates as CaCO3; gallons vary by influent nitrate level |
| Capacity Calculation | Estimate gallons by dividing 3000 by the influent nitrate ppm calculated as CaCO3 |
| Sulfate Impact | Breakthrough is listed as not affected by sulfate levels |
| Regeneration Requirement | Can be regenerated using sodium chloride brine |
| Regeneration Timing | Varies based on influent nitrate level, water usage, and cartridge performance |
| Flow Rate | 0.3–0.5 GPM |
| Operating Pressure | 20-60 psi |
| Operating Temperature | 40°F-90°F |
| Optional Add-On | Washable pre-filtration filter for countertop models |
| Water Testing Guidance | Nitrate treatment should be selected and maintained based on water test results and influent nitrate level. |
