re: Question for pool owners

quote:

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drain some and refill and get the cya back into tolerable limits

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Good plan.

And note that not all algaecide is the same. I find the quaternary kind works okay, but not great. Avoid all the enzyme products such as Phosphore (or however you spell it). These are a total waste of money. Cooper-based are the best but DO NOT put more than the direction call for because it will come out of solution and stain your walls, steps, etc.