Cal Aqua Double Drop Checker

Discussion in 'Carbon Dioxide (CO2)' started by alexandre, 7 Jun 2008.

  1. alexandre

    alexandre Member


    Any body tried one?
    I like the idea, because the color of the drop checker can change quite a bit, thickness of the glass, different spectrum etc... Mine never look the same when I take it out the water. But that way it sound good to me, it make sense on the paper. But does it really work? I am tempted to order one...
  2. Wolfenrook

    Wolfenrook Member

    West Midlands UK

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