This book is a practical guide for anyone who wants to use healthy, vital drinking water. It presents solutions on how to produce good drinking water from sources such as tap water, well water, stream water, or rainwater. It is a hands-on book. The author has tested, built, and sold water treatment systems for over 20 years. He optimized existing systems through his own developments, which he refined in collaboration with physicist Udo Sperlich, enabling him to create mineral-rich, vital drinking water from any source—without chemicals and without electricity. He shares his experiences in areas such as sleep space assessments and creating a healthy indoor climate. Additionally, the book discusses the principles of how good water functions in the body and covers the topics of groundwater and surface water, along with how to utilize them.