Dan Hardy has used every available resource in his 20-year career as a pool professional to add to his store of knowledge about making and keeping water safe. An untiring and dedicated 'Pool Doctor', he has become the 'go to' man for owners of some of the world's largest, most ornate, and expensive private swimming pools -- including that of award-winning actor Mr John Travolta and his wife, Kelly Preston. Dan started working on pools as a boy in his dad's firm. Not content with doing routine maintenance, he began learning all he could about chemicals, mechanics, and safety. In this book he may just be a lifesaver to pool owners who want to save money on maintenance but need to know how to handle poisons safely. Pool maintenance business owners will want to have this book on hand as an easy guide to repairing filtration and pumps and dealing with serious pool problems. And anyone who wishes to have such a career could have no better mentor than Dan Hardy.