The Pentair Lil Shark Pool Cleaner effectively cleans vinyl surfaces in flat or dish-bottom above ground pools. The Lil Shark Pool Cleaner installs in minutes without special tools or fittings. Since it operates on the suction produced by your pump and filter system, it runs automatically whenever your pump is operating. The Lil Shark’s two-way cleaning action removes even the toughest grime. The Lil Shark comes equipped with everything you will need for a spotlessly clean pool.