Hayward's Wanda Whale Pool Cleaner is trouble-free and easy to use. Never empty or replace a debris bag again! Works with existing filtration systems — no booster pump required. Wanda Whale loves to circulate, thus improving water circulation by acting as a moving main drain, pulling water from the bottom of your above ground pool as it moves. The Wanda Whale automatic pool cleaner keeps your pool clean easily and effortlessly, it will be love at first site!