This Intex Ultra XTR Frame Pool is stronger than traditional round metal frame pools as it combines high quality galvanised steel with a precision engineered locking system to enhance the overall quality, durability and stability of the pool. This pool is easier to assemble and the frame design allows for the pieces to fit together so smoothly and securely that no separate locking pins are needed!This pool can be assembled in less than an hour ready for filling. The frame snaps neatly together without the need for tools or any previous experience. The pool should be positioned on perfectly level ground or the pool will not fill correctly; the sides will bow out and the water level will be lopsided.This pool comes with a Krystal Clear™ 1500 gal Sand Filter Pump with Hydro Aeration Technology for increased water clarity. Sand Filters are one of the most popular ways to keep pool water clean. Not only is it effective, it saves on cost and time since the sand needs replacement just once every five years - making the sand filter system one of the easiest to maintain. This pool features Intex’s patented Hydro Aeration™ technology improves water circulation, clarity and freshness.Advanced Filtration and CirculationInjecting air into the water accelerates circulation and joins fine particles into larger clusters that can be filtered more effectively.Improved ClarityAeration removes minerals like manganese and iron through oxidation for ultimate water clarity.Increased FreshnessMore negative ions are generated by activating air bubbles, which improves overall air quality around the pool.Included with this pool:Intex Sand Filter Pump - flow rate 1,500 gal / 4,000 Ltr (26644)Safety Ladder Ground ClothPool CoverThis filter pump requires 12kg Filtration Sand or 8.5kg of Glass Filtration Media (Not included).