Answer
Oct 23, 2025 - 08:04 PM
A water softener primarily removes calcium and magnesium ions, which cause water hardness, by exchanging them with sodium or potassium ions through a process called ion exchange. A deionizer, on the other hand, removes nearly all ions, including both cations and anions, from the water, resulting in highly purified water. While water softeners are typically used to prevent scale buildup in plumbing and appliances, deionizers are used in applications requiring high purity water, such as window cleaning with a water fed pole.
