Re: K2SO4 and MgSO4

[Ric Otte <ric at otte_ucsc.edu>]

Chuck,
Forgive my ignorance of chemistry, but if the important part of K2SO4 is
the K, is that the same K as is found in KNO3?  In other words, is the
tank getting K from both K2SO4 and KNO3?  And so the amount of K2SO4 one
adds is really dependent upon how much KNO3 one is adding?  
Thanks,

Ric

On Tue, Apr 01, 2003 at 08:16:45PM -0500, Chuck H wrote:
> The "important" part of K2SO4 is the potassium (K) and not the sulfate 
> (SO4).  You may be able to find K2SO4 locally as Sulfate of Potash.  Check 
> garden centers, agricultural suppliers, etc.  The purity of the stuff sold 
> at these places varies, so you may want to look before you buy if 
> possible.  Anything that claims to be ok for hydroponics or greenhouse use 
> would be ideal.
> 
> Though my preference is for K2SO4, another option that you can probably 
> find locally is potassium chloride (KCl).  It may be labeled as Muriate of 
> Potash, De-icer, or salt substitute.  You can get a large quantity at 
> places that deal with water softeners -- the Sears store here has 25lb bags 
> of Morton KCl.  That oughta last a century or two.
> 
> If you end up opting for mailorder, try http://www.litemanu.com.  They have 
> great stuff reasonably priced.
> - --
> Chuck Huffine
> Knoxville, Tennessee
> 
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