The most common form of sanitiser in the Australian market, is salt chlorination. A salt chlorinator uses a process called electrolysis to convert salt into chlorine to sanitise your pool. This is a very cost effective way of sanitising a pool, and is far cheaper and safer than using liquid chlorine. There are also other "secondary" sanitisers such as UV and Ozone that can decrease the amount of chlorine required to keep your pool water safe and sparkling.