Never ph checked my tap water And I'm about to Its from a natural spring. You think the ph stays pretty consistent from day to day. Week to week ? Sent from my iPhone using Grasscity Forum mobile app
If you're doing a flush because there is something wrong with your plant, pH the last couple of gallons going through and the rest doesn't matter. I pH everything that goes into my plants all the time. TWW
I also always ph any water or nute mix that goes into plants. I think it's a good habit at the very least