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Thread: effect of high free chlorine on Ph

  1. 05-05-2008, 07:28 PM Back To Top    #1
    mikemedic
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    effect of high free chlorine on Ph

    I have been keeping my FC at 25 to kill an algae bloom. My PH was ~7.4/7.2
    Its reading 7.0 now
    My alk is about 60-70
    Should I let my FC drop before I adjust?
    Does high FC make ph rise or fall
    Thanks

    Mike
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  2. 05-05-2008, 07:47 PM Back To Top    #2
    JohnT
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    High FC doesn't affect the pH, but it does mess up the test. Wait for lower FC before you trust your pH reading.
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  3. 05-05-2008, 09:18 PM Back To Top    #3
    mikemedic
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