Water hardness is typically caused by a large number of minerals and rocks that are dissolved and finds its water in your water. Calcium and Magnesium are the two main minerals that cause hard water. The water that you drink and use in your appliances and other plumbing in your home is considered to be hard if one of the two minerals is present. Sedimentary rock such as limestones dissolved in your water system and cause an increase in hardness. When hardness is present in your water it makes it really difficult to make suds resulting in using significantly much more soap to get the job done. The hardness that is present in your water prevents your friendly bubble monster from coming out to play.