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Water Question

Discussion in 'General Dwarf Cichlids' started by gingerbeer, Apr 15, 2010.

  1. gingerbeer

    gingerbeer Member 5 Year Member

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    Testing my water from my rain water tank I observed the following:

    pH 7.2
    KH 30 mg/L
    GH 20mg/L

    I cannot understand how soft water can have a neutral pH and hold it so well.

    Please explain?

    Steve
  2. Mike Wise

    Mike Wise Moderator Staff Member 5 Year Member

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    I think we need more information:

    What is the tank made of?

    Is it an open tank or closed (how tight)?

    What does the rainwater run off of (roof composition, etc.)?

    How long has water been in the tank?
  3. gingerbeer

    gingerbeer Member 5 Year Member

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    Roof is tile - tank is plastic - closed with a small opening. tank has been in place about 1 year.
  4. Rod

    Rod Member 5 Year Member

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    Water should be ph 7

    Generally rainwater will be acid when it falls due to co2....ie dilute carbonic acid

    Perhaps there is a bit of leaching from roof tiles(concrete) just enough to offset the acid and add dissolved solids to the water......can't image too much air pollution at Pullenvale!

    I'd image ph will drop with addition of peat or ketapang