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I've done the SLAM only to have green/yellow algae recur in 7-10 days. 15,700 gal pool, Florida, temps 94F+ Start of SLAM: pH = 8.2 - adjusted to 7.2 (measured) TA = 70 CYA < 30 (top of sight tube is 30 ppm -- so something less then 30) FC = 0 FC after add = 15 Maintained FC 10-15 for a week...