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Thread: Odd Occurence

  1. Back To Top    #1

    Join Date
    Jun 2015
    Location
    Bedford hills ny
    Posts
    46

    Odd Occurence

    For the last month my water had been pretty much the same:
    FC 3-4
    CC 0
    Ph 7.6-7.8
    TA 110
    CH 300-350
    CY 60ish

    The ph started spiking so I put MA I. The pool and took to 7.2

    TA went 90
    And oddly FC went to 6

    48 hours later FC is at 8, ph is back to 7.6 and TA is 100

    The only other change I made was I changed my de filter grids out and went from using 1 filter to two.

    Is there any reason my FC should spike like this? I haven't changed anything on my SWG or added chlorine.




    20' x 50' AG gunite pool (no idea on gallons) built a long time ago. DE Filter w/Hayward Pump. Well water.

  2. Back To Top    #2
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Odd Occurence

    Maybe the offline filter is full of leaves and twigs that the chlorine has been trying to oxidize?
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  3. Back To Top    #3

    Join Date
    Jun 2015
    Location
    Bedford hills ny
    Posts
    46

    Re: Odd Occurence

    I changed the de grids on it as well. So I went from one clean but beaten up de filter to two clean filters with new grids. Perplexing.


    20' x 50' AG gunite pool (no idea on gallons) built a long time ago. DE Filter w/Hayward Pump. Well water.

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