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  1. We are after as many aquarium plant images that we can get, doing so will assist us in completing the aquarium plant database.

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GH help wanted.

Discussion in 'Advanced Strategies and Fertilization' started by aqualung, Jan 28, 2005.

  1. aqualung

    aqualung Junior Poster

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    Test kit reads GH of 6 (107 ppm)

    Professional lab reports:

    Calcium 36 mg/L
    Magnesium 9 mg/L
    Sodium 34 mg/L

    When I add these up (include Sodium??) I get 79 mg/L

    Something does not add up. Anyone, please share your thoughts. :confused:
     
    #1 aqualung, Jan 28, 2005
  2. m lemay

    m lemay Prolific Poster

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    Re: GH help wanted.

    Theres a lot of potential variables here. Is the lab report from the exact same water sample from the same time? If not, your comparing apples and oranges.
     
    #2 m lemay, Jan 28, 2005
  3. aqualung

    aqualung Junior Poster

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    Re: GH help wanted.

    No, the lab report was from water I drew from the well towards the end of December, and I did not test that sample myself.

    You mentioned other variables. Can you or anyone else think of a few other ones?
     
    #3 aqualung, Jan 31, 2005
  4. baruch mor

    baruch mor Prolific Poster

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    Re: GH help wanted.

    i would guess that the "aquarium" test kit is not accurate as the lab test. its about 25% difference - u should take into consideration that u can always get 5% error from each test kit , specially "aquarium" test kits ...
     
    #4 baruch mor, Jan 31, 2005
  5. aqualung

    aqualung Junior Poster

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    Re: GH help wanted.

    I just found what I wanted on The Krib:

    1dGH = 7.143 ppm Ca2+ ....so....

    36 mg/L Calcium ÷ 7.143 = 5dH

    So my hobby-grade test kit turned green after 6 drops, that's close enough. All is right with the world.
     
    #5 aqualung, Feb 1, 2005
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