Aquanerd Posted December 19, 2005 Report Share Posted December 19, 2005 I was wondering if anybody knows this or has read it somewhere. How much Potassium in Mono Potassium Phosphate? Since on Chuck's Planted Aquarium Calculator it shows how much Potassium is in KNO3. Also do you even dose potassium? I've read that too much potassium can cause calcium intake problems. So I've never dosed... Thanks all for your help. Quote Link to comment Share on other sites More sharing options...
Milan Posted December 19, 2005 Report Share Posted December 19, 2005 (edited) Based on molecular weights (K=39.1, H=1, P=31, O=16), KH2PO4 has 28.7% of Potassium. Plants need about 20-30 ppm of K to live. Are you going to dose K2SO4 or not, depends on the amount of K you are supplying with KNO3 and KH2PO4. EI (Estimative Index) does not call for K2SO4, since it's based on dosing of the two in excess. Potassium deficiency is easy to diagnose. On older growth you will see tiny black pinholes with yellow areas around them. Overdosing of K, and interference with Ca uptake, according to what I read, is a myth. Edited December 19, 2005 by Milan Quote Link to comment Share on other sites More sharing options...
Aquanerd Posted December 20, 2005 Author Report Share Posted December 20, 2005 Well I think that I should be fine in the Potassium area, I might dose like 5ppm maybe with my macros... just to get rid of what I have bought already awhile ago when I knew less then I do now. Thanks again Milan Quote Link to comment Share on other sites More sharing options...
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