The Dolphin Active 20 features Active Brushing that scrubs away algae & bacteria. The advanced scanning of CleverClean technology ensures complete pool cover in two hours or less. Thanks to its ultralight weight & quick water release, the Dolphin Active 20 is easy to handle. Filteration options capture rough debris or fine dirt to leave your pool floor, walls & waterline sparkling clean. The Dolphin Active 20 is a fantastic robotic pool cleaner for most inground pools.