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    Default Re: Starting resurfaced pool

    Please ignore the CPO guidelines -- the info here is *much* more up-to-date. Chem_Geek, who started here in 2000 or 2001, has repeatedly tried --without much success -- to get the NSPF (behind the CPO) and the NSF to update their standards to reflect the work of Obrien (1972, I think) and Wojitowisc (circa 2000) and his own extensive analysis published here, on his personal home page, and elsewhere. (Wojitowisc' journal article in the JPSI was what gave me the confidence to publish my own observations in the first Cl-CYA page, which I called the "Best Guess Chart".

    At this point in time, I'm pretty confident that Chem_Geek knows more about pool chemistry, from an comprehensive analytical view, than anyone else in the world. (Ernest Blatchley at Purdue is doing great work, but doesn't know about pools overall.) Add to that 10,000's of pool owners confirming not only my Best Guess chart, but Chem_Geek's analysis . . . and the CPO and NSPF are decidedly 'behind the times'.

    But, given the fact that 'doing it right' would cost the pool industry literally $100,000,000's per year, their incentive to 'fix' things is small!

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    Default Re: Starting resurfaced pool

    Ben:

    Very willing to learn based on updated info!!!

    1/ "Wojitowisc' journal article in the JPSI" seems to be what I found at jspsi.poolhelp.com/ARTICLES/JSPSI_V5N1_pp20-38.pdf and the table on chlorine is indeed informative though not very legible. Your best guess chart reads much easier ;-) Any pointer to "Obrien (1972, I think) and Wojitowisc (circa 2000) and his own extensive analysis published here" (I could not find this)?

    2/ Do you or Chem_Geek have a page summarizing updated recommendations kind of like what is on that page 44 of the Taylor guide but updated?

    Thank you!
    In-ground 14K-gallon Pebble Sheen outdoor pool with 4-jet spa, Taylor K2006C testing kit, bleach chlorination, baking soda + muriatic acid for TA/pH adjustments, Hayward Ecostar SP3400VSP, Hayward H400FDN heater, Hayward DE6020 60-sqft DE filter, pressure-side Polaris 380 cleaner.

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    Default Re: Starting resurfaced pool

    Simpler:

    When everything is fine, no algae is present, and the bather load is light, FC = 5% of CYA (0.05 x CYA ppm = FC ppm target).

    Under heavier load, 10%

    With green algae, 15% - 20% or -- long term -- to remove black algae.

    Mustard algae, 25% - 50%

    With borates > 60 ppm, and especially, with phosphates < 125 ppb (0.125 ppm), the algae treatment levels can be lowered.

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