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Filters are very important to every swimming pool. By filtering and circulating water, in-ground pool filters help to keep pool water clean and safe for swimming by removing debris and potentially harmful contaminants. Since in-ground pool filters perform such important tasks, it's vital to choose quality, reliable models that will provide a high level of performance on a regular, consistent basis. There are many different types of in-ground pool filters. You have sand filters, cartridge filters and DE filters. Sand filters capture particles down to very small sizes, and does not have a true cut off size below which particles will always pass. The sand filter collects and attract the debris as small as 20 to 40 microns. Cartridge filters have a greater surface area than sand allowing for fewer clogs and easier maintenance. They run at lower pressure than sand which puts less back-pressure on the pump, providing more flow and turnover.Cartridge element filters trap debris as small as 10 to 15 microns. Diatomaceous earth (D.E.) is mined and is the fossilized exoskeletons of tiny diatoms. They are used to coat "grids" in the filter housing and act as tiny sieves allowing for the removal of debris as small as 5 microns.
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