When I bought CYA in May, it took several days to dissolve. I bought another container about 3 weeks ago, and used it for the first time yesterday and today. It is dissolving within a few hours!! Does the "freshness" of the CYA have anything to do with the time it takes to dissolve? All were the same Clorox brand and size, purchased at Wal-Mart. I added it to the pool the same way (sock method in the skimmer). I'll retest my CYA again in a few days just to make it comes up the amount I am expecting. This is just an "inquiring minds question", I wondered if anyone had the same experience?
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