The NuvoH2O Home system softens your water without removing the healthy 'hard' minerals in your water. Unlike old-fashioned softener systems, our system does not remove and replace hard water minerals, such as Calcium and Magnesium, with sodium or potassium. We use a citrus-based softening formula, called CitraCharge®, which bonds to these minerals making them incapable of sticking to pipes and surfaces.