So you're sayin I should stick with 1/4 tsp instead of upping to a 1/2 tsp? It would coincide with what Django said about keeping low dosages I suppose. And why KH2PO4? How does it benefit the plants?
Does anyone have a link that would explain how plants utilize each fert? Or rather, the effect of the ferts on the plants directly?
Yes, do not trust your test kit unless youve calibrated it.
KH2PO4 is mono potassium phosphate, it gives the plants P and more K. I didnt realize you were already dosing both.
Theres no quick answer for that haha. Google macro and micro nutrients for plants and start there.