Thinking about it how would i even test the end resulted of my washed promix, i'm using a water hose outside and draining it into a 30 gallon trashcan. my city water is 300ppm 7.8-8.1 ph
The end result would leave my promix higher in ph i would assume right? i have been feeding my plants 5.8ph to make up for this as i normally use 6.2-6.5