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Uploaded by SwimJimNYC on May 5, 2008
Chemicals at our pools should always be in this range:Free Chlorine: 1.5-3 PPMCombined Chlorine (less than 2 PPM)pH: 7.3-7.6Calcium Hardness: 200-300 PPMAlkalinity: 80-120 PPMEditing, Narration, Cinematography by Nick Foley, SwimJim, Inc.http://www.swimjim.com
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