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Thread: Hair-brained idea

  1. Back To Top    #1

    Join Date
    Jan 2014
    Harrisburg, NC

    Hair-brained idea

    It's about time to close our pool for the season, and when I say "close the pool", I mean just no longer get into the water. We don't cover it, or worry about freezing in our area. Conventional wisdom to keep the pool balanced is pH should be around 7.6, reasoning that this is the pH of the human eye. However, with no humans using the pool until spring, I was wondering if perhaps I should bring the pH down to a more neutral level (towards 7.0), since this in my mind would be easier on the pool / pool equipment?

    Thanks for any input!
    2005 build, 16K gal, IG - vinyl, 3/4 hp WhisperFlo pump, sand filter, Polaris cleaning robot

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: Hair-brained idea

    It does not work that way. By lowering the pH that low, you would infact increase the likelihood of damaging the pool and equipment.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
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  3. Back To Top    #3

    Join Date
    Jun 2013
    East TN

    Re: Hair-brained idea

    Temperature has an effect on CSI. The lower the temp the lower the CSI. In other words the pH would actually need to be higher in the winter than in the summer to have the same CSI.

    Play around with pool math and you will see what Im talking about.
    18,000 Gallon Aboveground. Sand Filter with 2HP 2 speed Pump.

  4. Back To Top    #4

    Join Date
    Mar 2007
    San Rafael, CA USA

    Re: Hair-brained idea

    Lower pH is more corrosive to metal. Tap water is usually in the 7.8 to 8.0 range for this reason. You do not want to lower your pH towards 7.0. Such "neutral" pH is not better, but actually worse, for metal corrosion. Also, for plaster pools (though yours is vinyl), the lower saturation index from the lower pH would tend to dissolve calcium carbonate from the plaster.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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