Description
Spring water, which contains (in addition to the substances found in rainwater) calcium sulfate, and when in high levels is called hard water, less is called soft water, which is preferred for medicinal purposes.
Related Subjects
The graph displays the other subjects mentioned on the same pages as the subject "Aqua Fontana". If the same subject occurs on a page with "Aqua Fontana" more than once, it appears closer to "Aqua Fontana" on the graph, and is colored in a darker shade. The closer a subject is to the center, the more "related" the subjects are.