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K2PO4 instead KH2PO4

Discussion in 'Aquascaping' started by ismenio, Dec 11, 2009.

  1. ismenio

    ismenio Lifetime Members
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    Hy

    Can i use K2PO4 instead KH2PO4 ?

    Regards
     
  2. Philosophos

    Philosophos Lifetime Charter Member
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    People use it as fertilizer, it's been used in planted tanks, and it should be safe for fish. You'll want to adjust your numbers accordingly for the extra K+ if you're trying to hit specific numbers.
     
  3. ismenio

    ismenio Lifetime Members
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    Thanks Philosophos.
    I´will make the adjustment, as long it´s safe for fish is fine for me.

    Regards
     
  4. aaronnorth

    aaronnorth Prolific Poster

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    K2PO4 isn't a valid compund,
    K2 has a charge of 2+
    PO4 has a charge of 3-
    therefore the overall charge is -1 (it has to equal 0)

    when there are 'gaps' like this you can usually assume an Hydrogen can take that place, so in fact they are both the same thing.

    Thanks, Aaron
     
  5. Philosophos

    Philosophos Lifetime Charter Member
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    Ya, it's actually K2HPO4. For some reason it gets labled K2PO4 in the hobby, just like people glazing over the H2O in most CaCl2 or MgSO4 related compounds.
     
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