Potassium Sulphate question...

Discussion in 'Aquarium Fert Dosing' started by Piece-of-fish, 16 Oct 2010.

  1. Piece-of-fish

    Piece-of-fish Member

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    Hi, is the garden sulphate of potash the same as potassium sulphate?
    I have purchased 3kg of the stuff thinking its the same thing. Hovewer it smells really nasty ;) has smaller grain and is brown greyish color. The label says sulphate of potash which consist of potassium oxide K2O with 41,5% K
    Help plz :D
    Regards...
     
  2. dw1305

    dw1305 Expert

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    Hi all,
    Yes it is the same compound, it is just a "horticultural grade" with some impurities in it. The slightly strange way of expressing the phosphorus content is that P is traditionally expressed as the %oxide rather than as the percentage of the element. Potassium oxide is about 83% potassium by weight. The comma is just because it is used in Europe rather than a full-stop so it is 41.3% K2O which is 0.83 x 41.3 = 34.3% K.

    cheers Darrel
     
  3. Piece-of-fish

    Piece-of-fish Member

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    Thanks a lot Darrel. Was expecting for a reply from you :thumbup:
    The thing does smell nasty hovewer i must say :sick:
     
  4. dw1305

    dw1305 Expert

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    Sounds like a sulphur compound is causing the smell
     

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