churchhaze
Well-Known Member
Potassium sulfate is 44.9% K by mass (not K2O). In order to get the same amount of potassium by mass as a gram of potassium silicate, you'd need 1.13g of potassium sulfate. It's also 18% S. Potassium hydroxide really would be a superior control because it doesn't contain S. (imo, it's straight up more useful than potassium sulfate, which I've never really seen the purpose of. Potassium nitrate is where it's at when you want potassium)