From what I have read and witnessed from my own plants are a downward PH drift in flower is suppose to happen as Veg will be the opposite with a rise in PH.
tinytoon Reviewed by tinytoon on . PH issued in DWC system Morning, I am currently in week one of my flowering and am having PH drops in the evening. Quick set up info, I am running 2 20 bucket black bucket system (5 gallon) with each one having 1 5 gallon brain (res) My temps when the lights are off are between 68 to 71 and when the lights are on temps are between 76 and 82. My humidity is currently around 30%. Now my last measurements were taking at 1 am and check again at 830 am this morning. 1 Am Sys 1 was at 6.0 PH EC @ 1.4 Sys 2 Rating: 5