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SEAKLEAR PARTICLE REMOVAL SYSTEM - Patented 2 stage Particle Removal System (PRS) enhances filter's ability to remove particles down to .5 microns. EPA approved to effectively trap Cryptosporidium (to 99.9%) and reduce outbreak risk. Also traps E. coli, reduces turbidity, removes oils, and helps clear cloudy pools. Works with sand, zeolite, DE, cellulose, and filter cartridges. Dosage: Stage 1 - add 4 oz. per 20,000 gallons, Stage 2 - add 4 oz. per 20,000 gallons, 6 hours after Stage 1 for best results
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