Should I messure the PH of the water going in or coming out?

Mattpd

Well-Known Member
The tap puts out 7.0 water, but the runoff out of the pots is around 6 or lower. There are no nutes. Since I am shooting for the 6.5 range, should I raise the PH of the 7.0 water to try to get the runoff at 6.5?
 
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