*The secrets of water maintenance trade professionals are revealed in this detail-by-detail guide to keeping pools, spas, and other recreational water containment units in tip-top shape. *Offers inside-out coverage of chlorine alternatives, automation, noise control, pool-side safety, portable spas--and everything from minor maintenance to major fixes and remodeling. *A must for pool maintenance and spa technicians, this book includes environmentally friendly product resources, along with troubleshooting tips and project checklists that make caring for a pool or spa less costly.