“

There are three general classifications of pool filters and all three types can clean your swimming pool.

Choosing among the three filter systems depend on certain considerations such as cost, ease of maintenance, location and other personal preferences.

Compared to sand filter and the more expensive diatomaceous earth (DE) filter, a pool filter cartridge is economical and considered low-maintenance. As water passes through a pool filter cartridge, particles are trapped by a fine sieving surface.

This filter catches particles and unwanted substances in your swimming pool. These are held in the filter system accumulating until it needs maintenance cleaning or cartridge replacement. A cartridge filter can cover more area than a sand type filter can. This means that it takes a longer time to clog and maintenance is far less frequent.

“

Source: (pool filter cartridge) http://ezinearticles.com/?Using-a-Pool-Filter-Cartridge&id=4271126