Not sure how a water softener works? It depends on the type, so you should learn more about these things before buying. Salt free water softeners do not use sodium, but generate a salt substitute based on potassium chloride. This model is excellent for those who are worried about the salt. From many points of view, this model is seen as a descaler. It does not clear minerals from hard water, but annihilates them and prevents them from building up. It is less efficient than classic softeners, but better than no softener. Visit Water Softeners Now for some reviews and explanations.