One of the most important components of any swimming pool is the circulation & filtering system. Pool water must be circulated through a filter for at least a few hours each day, otherwise, there is no way for dirt, algae, insects or other unwanted substances to be removed from the water. Additionally, without water circulation, chlorine and other chemicals or additives won’t be dispersed throughout the water.
Most soft-sided pool kits include a pump/filter unit in the box with the rest of the pool equipment. These units are adequate for the most part, but upgrading is not a bad idea either. These units have a compartment that houses a paper medium filter cartridge that should be changed or cleaned weekly.
Permanent swimming pools – such as in-ground pools or hard walled above ground pools – also use pump/filter systems. These offer some advantages over the standard unit included with Intex pool kits, however they are also more expensive and you must find a way to adapt their fittings to soft-sided pool fittings.