The Best Types of Swimming Pool Filters for Fine Sediment

Microns Matter

• A micron is the measurement by which all filters are rated. The more efficient a swimming pool filter, the smaller the particles it can capture. To put the microns in perspective, the average human hair has a diameter of 90 microns. The naked eye can usually detect (some better than others of course) a particle as small as 40 microns. Most pool filters on the market are capable of trapping debris that is smaller than the naked eye can detect.

Diatomaceous Earth

• The most efficient filter on the market for fine sediment is a diatomaceous earth filter, also known as a D.E. filter. This type of filter works by depositing D.E. powder, which is a soft, crushed sedimentary rock, into the filter through the pool skimmer. The D.E. powder attaches itself to the filter grid, which work together to capture dirt and particles as small as 3 microns in size.

Sand and Cartridges

• Sand filters are another type. This can trap dirt and particles as small as 20 microns, which is still smaller than what the naked eye can see. The sand inside the filter is responsible for trapping the dirt and particles. Cartridge filters are the least efficient but may be the easiest to maintain. Cartridge filters use a polyester pleated cartridge and captures dirt and debris as small as 25 microns. This is the least efficient filter on the market in terms on micron particle size.

They All Work

• Any of the three pool filter types will work well enough with your swimming pool to provide you with crystal clear swimming water, assuming you follow a dedicated maintenance schedule. Maintenance and cleaning the filter whenever necessary is the key to a well-maintained and efficient system. Even though the diatomaceous earth filter is the most efficient in terms of microns, the sand and cartridge are a safe bet as well. Monitor your pressure gauge, and clean the filter whenever the pressure rises 8 to 10 lbs. per square inch (psi) above its normal operating pressure.