I found this from farside back in July:
I know we've batted around the whole "to pH or not to pH" nute solutions quite a bit in different threads. It gives me a level of comfort and there's nothing in there that's gonna hurt anything. I checked pH a grand total of 2x during my last grow and don't plan on taking out the pen at all this time using the 11 mixing method. 3). It worked last grow pretty damn good. Not fucking with success.