A water softener will remove the calcium and magnesium ions that make up the hardness in your water, utilizing NSF certified ion exchange resin.
You can think of a water softener as a magnet. As your water passes through, the resin attracts the hardness keeping it within the vessel, leaving you with soft water. During the softener’s regeneration, the magnet is reversed sending all of the hardness to your drain. The regeneration process involves rejuvenating the resin bed with a salt brine.
The only way to truly remove hardness is through the ion exchange process. Don’t be fooled by the “Salt-less” softeners or “clamp-on magnetic” softeners that don’t actually remove the hardness from your water. They are simply keeping the hardness in suspension, allowing it to continue to scale fixtures, bathtubs and appliances.