Water softeners are useful for homes in a hard water area. They remove minerals from municipal and well water, saving appliances and fixtures such as dishwashers, clothes washers, faucets and toilets, as well as making the water feel very good to the consumer. The salt usage for a water softener is dictated by hardness of water, number of people in the household, and water consumption. Culligan is a major manufacturer of water softeners and provider of water softener services. Here is how to set the salt dosage on the Culligan Medalist line of household water softeners.