What is pH, and why do you check it ? ...........
Still not been to the grow shop and asked......they have a sign on the wall saying they'll ask you to leave if you discuss certain stuff and I think buffered nutes might be on the list along with LEDs.
It is however nice to be able watch your plants chomp through nutes and generate healthy pH swings which I'm told can be used to increase nutrient uptake.
Anyway, pic of a bit of a flower, day 50 something I think