Introducing Aquasana's new and improved Claryum® 2-Stage! This under sink water filter instantly transforms your ordinary tap water into clean, great-tasting water for 500 gallons or up to 6 months. This system now features even better contaminant reduction. Aquasana's Claryum® filtration technology is tested and certified to NSF/ANSI Standards 42, 53 (includes P473), and 401, for the reduction of 99.995% of Cysts, 99.6% of microplastics and lead, 99.7% of PFAS Forever Chemicals (specifically PFOA/PFOS), 97.3% of chlorine, and 91% of chloramines. The PFOA/PFOS results are tested down to 20 parts per trillion (PPT) per NSF's new, even more stringent testing protocol. The Claryum® 2-Stage is also certified to reduce mercury, herbicides, pesticides, pharmaceuticals, and more. In all, it tackles 15X more contaminants than the leading pitcher filter, with a flow rate that's 5X as fast. Claryum®'s selective filtration technology retains naturally occurring beneficial minerals found in water like calcium, potassium, and magnesium for healthier, more delicious water. Our under-sink water system features two powerful filters, combining powerful activated and catalytic carbon with ion-exchange and sub-micron filtration for premium water filtration. These filters are intelligently designed with the environment in mind. The Claryum® 2-Stage utilizes minimal disposable plastic parts for reduced plastic waste, so that you can enjoy clean, filtered water, without adding unnecessary plastic waste into the environment. Each filter set lasts up to 500 gallons - replacing over 3,750 plastic water bottles for less than a tenth of the cost. Make a difference with this sustainable, eco-friendly solution. We make it easy to know when you need to replace your current water filter. The Claryum® 2-Stage will alert you when it's time to change your filters. Filter replacements are engineered to be quick and easy. There is no need to disconnect hoses or water lines - simply twist off and repla