Calgon Carbon produces and sells a broad range of activated impregnated or acid washed carbons in granular powdered or pellet form. Granular Activated Carbon (GAC) particles are irregular in shape and generally used in fixed filter beds for continuous flow purification processes. For the most effective chlorine reduction activated carbon should be sized to flow at 2-3 g.p.m. per cubic foot (ft3 of media. All About : Activated Carbon Design Info for Activated Carbon Media Activated Carbon Systems

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