Does anyone use a potassium test kit? I've got potassium dry ferts on order and thinking of getting one. There is a pretty cheap one that is +\- 15ppm and a more expensive one ( but buy able) at +\- 3ppm accuracy.
I've got no idea what I need to measure for and accuracy needed if anyone may know?
My second question is that I noticed there was potassium carbonate, potassium chloride, potassium sulphate and mono potassium phosphate dry ferts. I was thinking gee, I just want potassium.
I went for potassium carbonate but wondered if I should get potassium sulphate as well ? Wondered what others buy for potassium dry ferts??
I've got no idea what I need to measure for and accuracy needed if anyone may know?
My second question is that I noticed there was potassium carbonate, potassium chloride, potassium sulphate and mono potassium phosphate dry ferts. I was thinking gee, I just want potassium.
I went for potassium carbonate but wondered if I should get potassium sulphate as well ? Wondered what others buy for potassium dry ferts??