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Re: Aquatic Plants Digest V6 #106
> From: Chuck H <grendel at usit_net>
> Subject: Re: K2SO4 and MgSO4
> Ric wrote:
> >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?
> Yep, the K in K2SO4 is the same as the one in KNO3. But your plants may
> not get enough K from KNO3 alone, hence the need for K2SO4 or whatever.
> >And so the amount of K2SO4 one
> >adds is really dependent upon how much KNO3 one is adding?
K2SO4 and KNO3: The 2 Ks in potassium sulfate doesn't double the amount of K
compared to potassium nitrate. Molecular weights are the key.
K2SO4 = 44.8% K, 55.2% SO4
KNO3 = 38.6% K, 61.4% NO3