Week 8 of Flower Lowering Temps/RH, lower CO2 concentration, lowering nutrient concentration, & lower light intensity to mimic fall conditions. Flushing is right around the corner. Day 50 of Flower Temp./RH Daytime:75F/45%RH Nighttime:60F/55%RH Day 53 of Flower Today, I performed a reservoir change for Pheno’s 1 & 2. I lowered the ppm to 400 & the pH is set to 5.8. The temperature of the nutrient solution in my DWCs is lowered because I have been inserting frozen 16 oz. water bottles in order to mimic fall temps. The temperature fluctuates, but it is consistently lower than without the frozen bottles.