Beat me to it. I bet you will go back to seeing exactly what you did before. Big drop, then nothing and then again when you change the rez or add CalMag. These gals have been deficient for awhile.....that ain't going to get fixed overnight.

since you have your calmag on board now....why not dump them and start your next set so you dont' get behind.

Ps.....I've heard that a ph lowers when roots begin dying off.