Completed Week 12 (Week 4 Bloom) with a bang, discovered I had Powdery Mildew! Culprit was a newer plant from another tent. Treated with a milk/water (60/40) solution and gave it a serious defoliation and even removed really bad PM'd bud sites. So pissed that I had left both tents open, when I should have kept only one open at a time. I am hoping I can stay on top of keeping it in control and will look to use an H2O2/water solution to briefly soak the harvest in afterwards to kill off any PM and other bacteria. I think next time, unless I know I can easily access all four sides of a scrog, it is very difficult to maintain and defoliate properly.