DE Filter

DE filters are commonly used in swimming pools as a standalone filter, or part of a series of filters that catch increasingly small particles.  They can trap particulate as small as 2 – 5 microns in size, and help prevent undesired materials, which may likely pass through filters, do not escape back into the swimming pool water.  Although dedicated DE filters are used, the diatomite itself can be placed inside sand filters, where the DE material rests above the sand in the filter to give the sand filter an additional boost in filtering capability.  Once the pool water is clear, the diatomaceous earth can be backwashed out of the filter.

Source:

• Wikipedia, Diatomaceous Earth.

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