So I diecided to go the dry fert method after using a couple of calculators to see that my Flourish products would not be economical.
I ordered Potassium Nitrate, Potassium Sulfate and Mono Potassium Phosphate.
All of these ferts have Potassium, yet I'm only using the Pot Sulf as a Potassium solution. Is there some chemical reaction that negates the K
in the other two ferts?