Natural swimming pools rely on the correct balance of living plants and micro-organisms to clean and purify the water. They are easy and less costly to maintain than chemical pools. Chlorine and other common pool chemicals that are hazardous to human health are not used. Natural pools are safe places for children to play and birds to drink, and are a dramatic example of ecological design, combining the natural and man-made worlds while creating beauty. These pools offer enjoyment not only in the warm months, but during winter, when they can be used for ice skating. Often the focal point of a garden, a natural swimming pool blends into the environment, flowing into the surroundings with plants and rocks. It reflects the changing seasons and enhances the environment naturally. This book is a necessary resource for people who consider a natural swimming pool. It shows how the natural system works to provide environmental, health, and safety benefits. Drawings, diagrams, and charts help explain their planning, design, biology, materials, construction, planting, and maintenance. Over 300 beautiful color photographs of natural pools will inspire your own water garden, where you can swim in harmony with nature.