Industrial Water Softeners remove hardness ions from water through ion exchange, which exchanges hardness ions for more harmless ions, such as salt. Hard water is water that has calcium and/or magnesium salts dissolved in it. The degree of hardness is directly related to the concentration of these salts.
Reverse Osmosis commonly referred to as RO, is a process where you de-mineralize or deionize water by pushing it under pressure through a semi-permeable Reverse Osmosis Membrane.
Osmosis To understand the purpose and process of Reverse Osmosis you must first understand the naturally occurring process of Osmosis.