Water softeners are used for the removal of hard ions such as calcium and magnesium from water to reduce hardness. Water softening works by utilizing a process called ion exchange which removes calcium and magnesium from water sources. This process is done through transferring hard water through the resin and using the beads within the system to maintain the mineral ions before eliminating them from the water. After the bead grabs hold of the mineral ions then the sodium ion is removed.