Critical Kush - (1.81p Harvest) 1000w

Start of Week 5 Over the last couple of days the smell went from a slight hint before entering the space to a pungent smell that just wofts from the plants. I've never grown a full screen before and never noticed how much these smell. It is possible it could be the Granddaddy Purple but my guess from the good bag smell on this strain, that it's the critical smell. I have two sections of plants growing from the same feeding resivour. For the first time ever I've decided to do a mid grow flush. I ran through 1-2gal of water on each 5 gal bucket. I use only perlite as medium so I figured that I wouldn't need much to flush. It all drained back to the main resivour and I disposed of it. I ran a 24hr cycle of straight PHed tallboy filtered tap water (160ppm) and then drained that again (340ppm). I refilled the resivour with fresh nutes and PHed again (1100ppm)