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  1. #41
    Extreme Koi Member Rank = Hassai Frich's Avatar
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    well tried to grab 1 liter of pond water, then i added 1 drop of vinegar, ph testet it and repeated.
    it seems the PH is about 8,6. every drop (5 tests) lowered the PH with 0,1 (measured the first 2 as 8,5 (max) then i got 8,4 8,3 and 8,2

    IF that is a reliable way to do it i dont know, i was hoping Syd could confirm or deny this (vinegar used was standard household vinegar 5%)

    have anyone tried these fairly cheap hand held meters ?

    pH Meter Essentials | eBay

    if they are semi reliable i might get one of thouse, i know they are not industry standard and most likely not as accurate, but it would get me out of my current problems.
    i have both 4,01 and 7,01 buffering solutions to calibrate.

  2. #42
    Extreme Koi Member Rank = Adult Champion bowsaw's Avatar
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    they could be fine, no idea how long the calibration lasts but its always worth redoing that each day you use it for the time it takes.

    get some deionized water, often sold as ironing water in supermarkets to keep the bulb wet,

  3. #43
    Frich,

    Vinegar is acidic so dripping it into a sample that you're testing will lower the pH but, if you're asking whether ordinary vinegar will be a reliable way to lower a high pond pH, I wouldn't recommend it. White vinegar is a more pure form of acetic acid so some people who like to treat their ponds or aquaria as a chemistry set adjust the pH with it but there are disadvantages with using an acid to lower the pH caused by a high pH source water.

    The first risk is abruptly changing the pH and stressing the fish. The second is the risk of reducing the KH to the point that the next addition of acid will rapidly cause a pH crash. The third is that every addition of new water will raise the pH again and will need more acid to reduce it which will result in the pH yo yoing up and down.

  4. #44
    Extreme Koi Member Rank = Hassai Frich's Avatar
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    Quote Originally Posted by Manky Sanke View Post
    Frich,

    Vinegar is acidic so dripping it into a sample that you're testing will lower the pH but, if you're asking whether ordinary vinegar will be a reliable way to lower a high pond pH, I wouldn't recommend it. White vinegar is a more pure form of acetic acid so some people who like to treat their ponds or aquaria as a chemistry set adjust the pH with it but there are disadvantages with using an acid to lower the pH caused by a high pH source water.

    The first risk is abruptly changing the pH and stressing the fish. The second is the risk of reducing the KH to the point that the next addition of acid will rapidly cause a pH crash. The third is that every addition of new water will raise the pH again and will need more acid to reduce it which will result in the pH yo yoing up and down.
    I would prefer as few chemicals as possible

    But no question was more as to my test method..

    At the moment i am just trying to get a solid reading on my ph with what i have available.

    Then i need to find some long term solution. Any good ideas welcome

  5. #45
    I often use vinegar to adjust the pH of a sample when I'm comparing pH testers and test kits or demonstrating during seminars or club talks how the colours of pH reagents change with changing pH values. It isn't an accurate method to achieve a set value but, as a demonstration, it works, it's rapid and easily available.

  6. #46
    Extreme Koi Member Rank = Hassai Frich's Avatar
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    What i figured thanks alot

    It shows me that i am just above the 8,5 and not at 9 or higher.

    Gives me abit of comfort

  7. #47
    Extreme Koi Member Rank = Mature Champion pip895's Avatar
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    6000g in ground koi pond
    +3000g lily/Anoxic pond attached
    29 koi (40 to 65cm)
    Bottom drain, Mid water & Skimmer to Drum
    JBR boichamber->Blue eco 500 pump ->below surface return.
    Blue Eco 240 -> Large MB -> Waterfall -> Planted Anoxic pond (25 baskets)

  8. #48
    Extreme Koi Member Rank = Hassai Frich's Avatar
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    Quote Originally Posted by pip895 View Post
    i unfortunatly have a hard time with any kind of test where i have to compare a liqued color to a chart

    thats why i have the hanna meter

 

 
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