NATURAL SWIMMING PONDS AND BIOFILTER POOLS: Planting Zones, Liner Systems, and Seasonal Water Balance Hardcover – March 15, 2026

A natural swimming pond replaces chemical water treatment with biology. Plants, gravel beds, and microorganisms work together to maintain water that is clean, clear, and free of chlorine or other manufactured additives. This book covers the full scope of designing, building, and maintaining these living water systems.The content moves through site selection and design principles, the characteristics and installation of different liner materials including EPDM rubber, polyethylene, bentonite clay, and concrete, and the function of regeneration zones where biological filtration takes place. Detailed chapters address the role of gravel substrates and biofilm communities in the nitrogen cycle and phosphorus management, the selection and placement of aquatic plants across four functional groups (emergent, submerged, floating-leaved, and free-floating), and the mechanical systems that circulate water through the treatment zones including pumps, skimmers, distribution manifolds, and aeration equipment.Seasonal maintenance is covered from spring startup through summer management, autumn preparation, and winter ice protection with aeration and de-icing strategies. A troubleshooting chapter addresses common issues including green water, string algae, cloudy water, odors, and plant problems, along with diagnostic approaches for identifying root causes. Safety considerations including fencing, barriers, electrical safety, and emergency preparedness are addressed.The book is structured around eight chapters with supporting diagrams and reference material throughout. Topics include the five classification types of natural swimming systems, water chemistry parameters, pump sizing and pipe layout, planting plans for regeneration zones, leak detection and repair procedures, and the long-term evolution and renovation of mature pond systems.Written for homeowners, garden designers, and anyone interested in chemical-free swimming and sustainable water features. Interior illustrations are presented in black and white. Read more