Understanding Pool Filtration Systems And Their Advantages

By Tammie Caldwell


Central to the efficient operation of a swimming pool, a filter is necessary when it comes to keeping the water clear and safe to swim in. Debris which collects in and on the water is removed through one of several filtering processes, reducing conditions which promote the growth of algae and bacteria. Whether one has an above-ground or inground pool, there are three main types of pool filtration systems, and each comes with certain advantages.

The water in a swimming pool typically cycles through the filter several times every day. Although the techniques vary from one filter design to the next, they all basically operate by pumping the water through a barrier which traps particles of dirt and such, removing it from the swimming pool. They differ in terms of price, care and maintenance, and in the benefits they provide.

Collectively referred to as the "filtration system", the pump and filter work together in tandem to ensure a clean pool. Water is forced into the filter by the action of the pump, then it is cleansed, and released back into circulation. Quality filter systems can provide years of use, and if they operate efficiently, it can help cut down maintenance time and expenses. Three main types of filters are available for both above-ground and inground pools; diatomaceous earth (DE), sand, and cartridge filters.

Most common are the sand filters. They work by filtering water through a bed of sand contained within them, which is capable of trapping debris measuring20 microns. Cleaning is easy, all that's needed is to run water through them in the reverse direction. The sand substrate doesn't need replacing for several years in most cases. The fact that they are economically priced and easy to use, makes them a top choice.

Also scoring high in terms of low maintenance, ease of use, and cost, is the cartridge filter. A replaceable cartridge element is responsible for filtering out particles as tiny as 10 to 15 microns in size. They have the advantage of being reasonably priced, and can simply be cleaned out with a garden hose, or using a filter cartridge cleaner. They must be replaced every swimming season in most cases.

DE or diatomaceous earth filter systems offer the ultimate in speed and efficiency. They can eliminate the very smallest particles of debris which are only 3 to 5 microns in size, and work quickly to produce crystal clear water. The substrate contained within them, known as diatomaceous earth, is a porous, natural rock sediment which has been ground into powder. While typically more expensive, this approach does offer superior results.

Independent of the type of filter one selects, it is best to ensure that it has a larger capacity than the recommended minimum. This will mean less frequent cleanings are needed. A design with minimal pumping action is also desirable, since this means money saved on the monthly power bill.

Ultimately, it is a matter of personal preference. Users who greatly value having ultra-clear water, will be best served with a DE filter, while those who are more concerned with ease of use, will likely prefer a cartridge or sand filter for its relatively simple maintenance.




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