I sprayed my plants with Potassium, 32 % Silicon 52% diluted in one gallon of water 4.5 Iiter put 1/4 tsp to 1/2 tsp in a gallon and my pH went up above 8, I can't say how far above 8 , so I lowered it to 7 w vinegar.
I then did a foliar application. Maybe a Slight burn as I didn't shake it well.