Hayward Pro Series 24 Inch In Ground Pool Sand Filter System Includes 1 HP Hayward Super Pump Energy-efficient operation and superior flow rates allow for years of trouble-free filtration The weather-proof tank is constructed of a tough color-fast polymeric material Features an integral top diffuser that evenly distributes water over the sand media bed Max. Pool Size: 29,760 gallons. Sand Required: 300 lbs.