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How much lemon juice or vinegar?

Discussion in 'General Aquaponics discussion - Aquaponics system ' started by Littlemomof3, Jan 26, 2011.

  1. Littlemomof3

    Littlemomof3 New Member

    Jan 9, 2011
    I need to lower the pH.... have a 75g tank its like at 8

    or should I just leave it?
  2. kellenw

    kellenw Member

    Dec 16, 2009
    Hi Aaron,

    Typically, the pH will begin to fall all by itself as the nitrogen cycle progresses unless you have something in the system that is serving to keep it elevated. Limestone gravel media is often the biggest culprit. What is the pH of your water source you are using to fill the system?
  3. Murray

    Murray Site Admin Staff Member

    Jun 4, 2009
    It is best if it is close to 7 or just a little below.
    It is true that it should gradually come down all buy itself, but often needs a hand in the early stages.
    It is easiest to use hydrochloric acid or pool acid to bring it down to where you want it. Small amounts, say one cap full of acid.....wait several hours and test the water again....and so on.

    Use the search function to find out more about this subject, it has been covered a lot in various threads.
  4. RupertofOZ

    RupertofOZ New Member

    Jun 15, 2009
    In a 75gall tank... 300L... I'd suggest only a couple of mils of HCL... not a capful...

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