I have a inteliDose Computerize system my Ph can be Controlled to .0 as I have nutrient controll as well. When I Change nutrients (weekly) 25 gallon res with 8-2 gallons hydroton over 2 gallon deep wells. So total of 40 gallons nuts. Recirulating $$$$$

I pump nuts from res to drip over hydroton on 15 minutes off 15 minutes..... Good Temp contrroll have 2 chillers on res ... PH is adjusted on day one PH is stable thru day 2 (very little auto dosing (ph rises ) by day 3 system is dosing every 15 minutes 1.5 oz GH ph down mixed 20 to 1. By day 5 system is autodosing PH the other way (seldom) than day 6-7 pretty stable again....

OH yea! use RO water
Doses like this weather the plants are seedings or honkers (So must be chemistry ,, Right ? ) My plants are so healthy!
Now I have grown a lot I know a few thing let your PH float up to 6.0 than bring It back to 5.5 what ever you think works for you I have grown with exact PH controll and the float PH way Plant really dosn't care AS LONG AS YOU KEEP IT BETWEEN SAFE LEVELS !! IF you don't your paying for nutrients that are not going to uptake...If you let it float you will use less GH PH up down over all

@5.6 to 5.8 almost all nuts are NOT LOCkED OUT HYDRO ... 6.1PH I guess if you use mud .. <(><