Hey bro, no worries, I'd rather ask a dumb question than make a dumb mistake.

I've even thought a bit bout this but never looked into it. My opinion is that you should check the pH right before you water to make sure nothing has changed and you're probably gonna hafta adjust it one way or another and have all the stuff out anyways so you just might as well go ahead and mix the nutes then too. I dont wanna hafta pull the stuff out twice if I can get it all done once.

Other than my work smarter not harder thinking I couldnt say if it effected or affected the nute quality any.