The three main types of pool filters are:
• Diatomaceous Earth
Which a person chooses to used depends on a pool’s size, usage
The sand filter collects pool debris in a sand bed that removes debris
as fine as 40 microns in size. These are the most commonly used pool
filters, since they work well with most pools. Unlike cartridge and
diatomaceous earth filters, sand filters require no annual maintenance.
Cartridge filters employ a paper-like, pleated cartridge to remove
debris as fine as 10 microns in size. These pool filters are less expensive
and easier to clean than the Sand and Diatomaceous Earth filters. Cartridge
filters require less cleaning because they generally filter areas of
300 to 400 feet.
Diatomaceous Earth or DE filters are the most expensive of the three
and contain advanced features. These pool filters use a method of plastic
grids and a powdery substance (diatomaceous earth) to collect debris
as fine as 5 microns in size. DE filters are sensitive and require more
maintenance then sand and cartridge filters making them impractical
for heavily used pools.