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Re: [APD] Using Sulphate of Potash in my tank

Potassium fertilizer percentages are reported as K2O. This is just a 
standard in the fertilizer industry. So, the fertilizer is composed of 
K2SO4, but the percentage of potassium is reported as if all the K2SO4 were 
converted to K2O. See table 3 in this link to see the K2O value for various 
potassium fertilizers. 

Jerry Smith
Bloomingdale, NJ

>Message: 3
>Date: Tue, 16 Sep 2008 16:33:30 -0400
>From: "TBarber" <terbarb at alltel_net>
>Subject: Re: [APD] Using Sulphate of Potash in my tank
>To: <stuart at mytriops_com>, "aquatic plants digest"
>	<aquatic-plants at actwin_com>
>Sulfate of Potash is K2SO4   not K2O (potassium oxide)...............try 
>----- Original Message -----
>From: "Stuart Halliday" <stuart at mytriops_com>
>To: <aquatic-plants at actwin_com>
>Sent: Tuesday, September 16, 2008 8:55 AM
>Subject: [APD] Using Sulphate of Potash in my tank
> > I've came across a container of powdered 'Sulphate of Potash' which is
> > to be K2O, Potassium Oxide. Nutrients: NPK  0 - 0 - 48
> >
> > http://www.william-sinclair.co.uk/gardening/products/plant_food
> >
> > Is it possible to add this to my planted Aquarium?
> >
> > Will this kill my tetra fish or shrimps do you think?
> >
> > MSDS safety sheet says it contains: Sulphate of Potash
> > Origin & Composition:
> > Total Potassium Oxide (K2O) 48% of which 39.8%K is soluble in water
> >
> > So I presume it's really K2SO4 or Potassium Sulphate?
> >
> > I've got a 15L tank where the plant leaves of my Lilaeopsis brasiliensis
> > starting to curl and yellow and I think it may be due to lack of

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