Quote Originally Posted by Rusty Trichome
I use the GH phDown (phosphoric acid) for my 8.0 wellwater. 1/4 tsp per gallon drops the water down to 6.7ish. If you need phDown, you don't need phUp. (and vise-versa)
My tap water(well water) is 7.0 and I have to use PH UP with my Foxfarm Nutes for flower as they drop the PH to around 5.
But when I use my Tapwater just for watering I have been adding a few drops of PH Down to lower it from 7 to around 6.7.
Is This NOT a good thing to be doing as It has been worrying me if I am doing the right thing.