Barney86
Well-Known Member
I've just read that again. It doesn't actually say to set the pH twice at all.Are you a chemist? My guess is that there's too many hydroxl ions that may lock up some of the nute ingredients if they are not brought into equilibrium first.
Edited to add: Here's a warning from an agricultural product using Potassium Silicate:
Warnings
SILISEC-K incompatibilities are due to its alkaline character. If possible, it should be used alone. In case of using it in mixtures, the pH should be measured after the incorporation of SILISEC-K to the tank and before adding the rest of products. Afterwards, the mixture should be brought to neutral pH through a pH regulator.
Just says to "measure" the pH before the rest is added. Then to adjust it afterwards.