Rather than removing beneficial minerals like old-fashioned salt softeners, the NuvoH2O system uses a citrus based formula, called CitraCharge, to bind hard minerals. Once bound to CitraCharge the minerals cannot form scale. NuvoH2O can even extend the life of costly water heaters. There's no change in your water's taste either! This system is built to not only soften your water, but also filter the water to provide better tasting and smelling water for your entire home. Cartridge replacement is recommended every 6 months.