Re: chem geek's table of FC loss percentages, posted 07/14/2012
My recently purchased house came with an 18,000 gal. pool and a CYA level off the chart. I drained 7,000 gal. and refilled, but CYA is still about 150, according to Leslie's. (Leslie's tells me that all other water chemistry #'s are OK.)
At 150 CYA, the Pool Calculator gives me a FC goal of 11-18.
Applying chem geek's 7.7% FC loss per day, I calculate that, if I start at FC 18, six days later my FC level will still be slightly above 11. Is this correct?