You'll need to know your Combined Chlorine reading in parts per million (PPM) before you can use the Shock Calculator. We recommend shocking with either . Pool Calculator helps you keep calculate your pool's chemical needs. Use our pool chemical calculator to help determine how much of each Sustain . Sustain Summer Shield Chlorine Extender, Sustain 3' Chlorinating Tablets . The results shown above are based upon Axiall Water Treatment Product's best . Apr 14, 2017 - Usually when I close I throw in the floater with chlorine pucks, but . Photo Gallery . So the Pool Calculator says with CYA at 50, shock level should be 16. . I guess I've been somewhat under-shocking for at least some of my . Aug 8, 2007 - The Pool Calculator is a handy web based calculator for figuring out amounts of chemicals to add, what your calcite saturation index is, and . treatment. In addition to the noun pool shock, it can also be used as a verb, in the act of shocking a pool, or adding granular oxidizer (pool shock) to the water in sufficient quantity for the desired online pool volume calculator. Generally . How to Shock Your Swimming Pool. Shocking is also known as super chlorinating. It's a way to keep pool water safe and clean by adding three to five times the . Clorox® Pool&Spa™ offers pool, saltwater pool and spa products to keep water crystal clear. Try free expert water analysis for product advice and anytime, . This pool volume calculator works for circular and Kidney or Irregular Shapes. Calculate . In such a case, you might want to treat the pool as two parts. Measure . Keywords: pool maintenance, pool calculator, pool chemistry, pool testing, pool chemicals, spa care, spa maintenance, spa calculator, spa chemistry, spa testing .