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A pool store tested my SWG, pool water, CYA level on 7/6/13: 73 ppm. After 3 - 5 inches of rain and three pump outs of excess water, I had the CYA level tested again on 7/27/13: 68 ppm. I used Taylor test kit K-2005 and received a reading, repeated three times, of 45 ppm. Given an error...

I use Taylor's K-2005 and TFTestkit TF-100 to test my pool water daily/weekly. I do the weekly test on Saturdays. Through June and so far this month my test results have been very consistent. After yesterday's, weekly test I took a sample to the pool store for a "professional" water test...

I want to remove 0.5 ppm of CC. The formula, CC x 10 = ppm of FC to add to reach breakpoint, is clear enough. However, because of the presence of 75 ppm of CYA in a 20K, SWG, IG pool, should more than CC x 10 = ppm of FC be added to overcome the CYA? And, if so, should that additional FC be...