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Thread: Alkalinity creeping up

  1. Back To Top    #1

    Join Date
    May 2009
    Location
    Greenwood, Indiana
    Posts
    25

    Alkalinity creeping up

    Here are my current levels:

    FC=4
    CC=0
    PH=7.7
    Alk=110
    CH=280
    CYA=40
    Borate=50

    Everything looks great. But I adjust alkalinity to 90 and in 7 to 10 days it creeps up to 110. This has been a regular cycle this year. What can cause that fluctuation?
    Strom

    16 x 32 Inground Vinyl, Infinity 2000 Automatic Cover
    Hayward S210T 2.2 sq ft Sand Filter with 1 HP Speck Badu EcoM3V Pump, Hayward H200 Heater
    Dolphin DX4 w/remote, CircuPool RJ-30 SWG, Taylor K-2006, SpeedStir, Borates, Zeosand

  2. Back To Top    #2
    Butterfly's Avatar
    Join Date
    May 2007
    Location
    South Carolina
    Posts
    10,045

    Re: Alkalinity creeping up

    What is the TA of your fill water?
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

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  3. Back To Top    #3

    Join Date
    May 2009
    Location
    Greenwood, Indiana
    Posts
    25

    Re: Alkalinity creeping up

    In don't know why I didn't think about that, but there in lies the answer. My fill water is:

    PH=7.6
    Alk=260
    CH=350

    Normally I pump rain water into the pool...our water here is quite hard. But since we haven't seen much rain lately I have been using the tap water.

    Thanks for pointing me in the right direction.
    Strom

    16 x 32 Inground Vinyl, Infinity 2000 Automatic Cover
    Hayward S210T 2.2 sq ft Sand Filter with 1 HP Speck Badu EcoM3V Pump, Hayward H200 Heater
    Dolphin DX4 w/remote, CircuPool RJ-30 SWG, Taylor K-2006, SpeedStir, Borates, Zeosand

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