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    Any pool with CYA of 140 ppm would require 14 ppm of FC

    Split off of CYA too HIGH?. JasonLion It is my understanding, that any pool with CYA of 140 ppm would require 14 ppm of FC, just to keep algae from getting started. At least that is considered common knowledge among thousands of pool owners and pool service people. 10% of CYA = needed FC. 14...