I recently switched to flower 12 days ago and up to then I had been mixing water by the gallon. I was tired of mixing 1 gallon at a time and bought a spigot for a 5 gallon bucket so I could add Cal/Mag, mammoth P, and PH down for my flowering plants. After the 3rd or 4th water I noticed some yellowing of the leaves and recognized it was PH because it happened before. My mistake was that PH’d the water first for some crazy reason and just realized I have been giving my FFOF plants 7.1 PH.
I am on untreated well water and my PH is 7.5 and PPM is 190 with no treatment.
My 2 questions are,
Should I flush them with the proper PH water or just wait until tomorrow when I water again?
After I add the recommended amount of Cal/Mag my PPM is 420, is that too low for soil and should I add more Cal/Mag or something else?