Intex Krystal Clear Sand Filter Pump for Above Ground Pools with 2100 Gallons Per Hour Flow Rate, Improved Circulation, and Easy InstallationThe Intex 2100 Gph Above Ground Pool Sand Filter Pump with Auto Timer provides cool, refreshing, clear water, and less hassle every swim season.If you are tired of buying and replacing your pool filter cartridges, this filter is the one for you. With virtually no maintenance, your sand pump only needs replacement every five years. Just hook up hoses and plug in! This pump is a must have for any above ground pool(Partial assembly required). Hydro Aeration Technology improves circulation and filtration, improves water clarity, and increases negative ions in the water.