The Dolphin Active 15 features Active Brushing that scrubs away algae & bacteria. The advanced scanning of CleverClean technology ensures complete pool coverage in two hours or less. Thanks to its ultralight weight & quick water release, the Dolphin Active 15 is easy to handle. Advanced filteration will leave your pool floor, walls & waterline sparkling clean. The Dolphin Active 15 is the best value robotic pool cleaner for small inground pools.