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Diatomaceous Earth Filters These filters are also referred to as D.E. filters In years gone by these were generally seen as the best of the best. D.E. as it is commonly known consists of fossilized remains of diatoms, a type of hard-shelled algae. It is naturally occurring rock type substance that is easily crumbled into a fine white to off-white powder. It has always been known as the most successful filter media because of its ability to filter the smallest particles. D.E. filters are not as popular for swimming pools as they once were. The reason for this is the improvement in sand filters the competitive prices of sand filters and the introduction of Zeolite and Glass as filtration mediums. Ask your pool professional about Zeolite and Glass for sand filters. Although very efficient DE filters are high maintenance compared to sand filters. Internal candles must be cleaned and coated with DE on a regular basis. Most companies no longer hold stock of D.E. filters, however they can be purchased as a special order. We hold large stocks of D.E. Powder (Diatomaceous Earth) 31 Diatomaceous Earth