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    First time user of TF-100, please help

    Hi, Dear All I am new pool owner. Just received my TF-100 and learn to do the drop test and CYA test. I have 2 questions. 1) how many R-870 shall I add? If I add one flat scoop, the water became pink but turned clear immediately after I shake the bottle. But I add one full scoop (or two...