High ph...

Discussion in 'Water Chemistry' started by Rollies wonder garden, Sep 23, 2016.

  1. Rollies wonder garden


    Apr 20, 2015
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    NE Ohio
    GH for years was pretty steady at 60. This year I added Epsom salt and calcium chloride to raise the GH to 107, to get the pH down from 8.8+.

    The difference in the pond this year is 1) more aeration (added an air stone to circulate water at bottom of the pond) 2) larger fish (3 are around 12", 7 are around 5-6") (As a reminder - my pond is 1,000 gallons.)

    Before adding any baking soda, Epsom salt or calcium chloride to the pond my readings were:

    For the rest of the year I have been maintaining KH at 107, GH at 107, and the pH has been steady at 8.4.
    cas, Oct 5, 2016
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  2. Rollies wonder garden


    Sep 29, 2010
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    South carolina
    I've seen ph as high as 9.6 in my pond visits, especially to ponds on well water. The fish appear fine even with a constant high level. There is the suggestion in the literature that high ph contributes to fish splitting. If the water comes from a city source, check their EPA report to see what they target and measure annually. If they target 9.6 I would just accept it or buy a water softening system.
    carolinaguy, Mar 2, 2017
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