I gotta say that @mephisto and @gbd really nail it on their detailed descriptions... and it is true that there is no "chem" pressence here... no gases, chemicals, skunk, its more like a faint rotten smell underneath those I have already described like bad breath or BO... almost cheese, but this is slight background noise...



and flush with straight pH'ed tapwater and in my experience this is when the colour changes occur most rapidly as the plant draws her nutrients from storage in her leaves... my temps also drop about 6 C for four hours a day throughout the grow, but next run is lights on 24/0 (attempt to shorten my cycle) so I won't have that temperature drop... so we shall see....