This is my first grow. Using aeroponics, with advanced nutrients. I'm in week 1 of flowereing faze and I have a 31 gallon rez filled with 7 Gallons of distilled water, I used Sensi Bloom A,B 4 ML per gallon and added Bud Factor X 0-0-1 2 Ml per gallon, My p.h keeps shooting up to 6.3 6.5 I used advanced nutrients ph down and it wont budge. What am I doing wrong? Please help. BTW plants look healthy. no