This site is supported by the advertisements on it, please disable your AdBlocker so we can continue to provide you with the quality content you expect.
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  2. We are after as many aquarium plant images that we can get, doing so will assist us in completing the aquarium plant database.
    Dismiss Notice

Water used in CO2 Drop Checker?

Discussion in 'CO2 Enrichment' started by pepetj, Oct 29, 2010.

  1. pepetj

    pepetj Lifetime Members
    Lifetime Member

    Oct 8, 2008
    Likes Received:
    Local Time:
    4:55 PM
    I have seen some commercially available CO2 drop checkers instructions stating to use certain amount (e.g. 1ml) of water from the tank and adding the reagent (which I suspect is bromothymol blue).

    However in my DIY Drop Checkers I use 4dKH solution which I get by adding a pinch of sodium bicarbonate (baking soda not baking powder) to distilled water (I use distilled water for intravenous use) to which I add some drops of bromothymol blue.

    Does the difference in water matters as far as the error of measurement? which one of these two options should be used?

    Santo Domingo
  2. dbazuin

    dbazuin Guru Class Expert

    Dec 30, 2009
    Likes Received:
    Local Time:
    4:55 PM

    I f you use water from you tank then there is a possibility that there other acid sources in it that lowers the PH other then the CO2.
    It then looks like you got more CO2 then you actually have.

    Stick with your 4dhk solution.

    I use a test witch come with complete test water.

Share This Page