I agree with Watermom. Besides, with a CYA of 60 (that's stabilizer) the "Best Guess" table says you need to shock to a level of 20ppm FC to clear your pool. 15 may well do it, but 11.5 won't.
Re: First time algea problem
I agree with Watermom. Besides, with a CYA of 60 (that's stabilizer) the "Best Guess" table says you need to shock to a level of 20ppm FC to clear your pool. 15 may well do it, but 11.5 won't.
Carl
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