First SuperBox DWC Auto Grow

Not much to say. Growth is literally out of control. I've managed to tie down colas making their way to the light, but for the most part I am not able to do much other than reep what I've sowed. As far as vitals go pH has been steady. Can't remember the last time I had to adjust pH. Nute solution starts at 1420ppm then I add RO H2O as needed until it's down to about 800ppm. Then I top off with 1420ppm nite solution. I've been doing that since flower began. They're eating like crazy though. I left for a two days and came back and the res was almost 2G gone. "The White Train" will be done first. My guess is a week or two. Can anyone give me a better guess based off of trichomes and pistils?