And ranting further......adding ph up and down DOES add ppms to your solution so IMO you can use too much of one or the other (or both as you go back and forth)and get your true nute ratios out of balance. This is one reason you should change your res at least once a week.....to rebalance ratios and ppms.
Weedhound Reviewed by Weedhound on . PH Levels What is the acceptable PH range in Hydro? Searching PH gives me no results... Rating: 5