18' x 48" Frame Set Above Ground Pool w/ automatic chlorinator-filter pump, ground cloth, cover, ladder, deluxe maintenance kit and dvd set-up The Intex 18 foot x 48 inch Metal Frame Pool with Saltwater System is a large, strong (thanks to its galvanized steel) pool great for family, neighbors and friends. For the ultimate combination of pool filtration, water sanitation, and convenience, our largest round metal frame pool comes with Krystal Clear Sand Filter Pump & Saltwater System Combo. Maintenance is incredibly easy because sand only needs routine backwashing and replacement every 5 years, and salt never needs replacement under normal conditions.