Which filter type removes the smallest particle size?

The diatomaceous earth filter is recognized for its ability to remove the smallest particle sizes from pool water. This type of filter uses a fine powder made from the fossilized remains of tiny, aquatic organisms called diatoms. The powder forms a porous structure that effectively traps particles as small as 1 to 2 microns, including algae and some bacteria, which are much finer than what other filter types can typically manage.

In contrast, sand filters generally remove larger particles, typically around 20 to 40 microns, due to the size of the sand grains and the spaces between them. Cartridge filters are also efficient but have a higher particle removal capability than sand filters, usually filtering down to 10 to 15 microns. However, neither can achieve the same small particle removal that diatomaceous earth filters can.

Thus, diatomaceous earth filters stand out as the most effective in capturing the smallest particles, making them the preferred choice for achieving high clarity and purity in pool water.