Fast Purple Regular seed Pheno hunt

On day 1 I did another light defoliation. The plants are progressing as expected. The only issue I'm dealing with is fungus gnats... ugh. I will keep applying BTI weekly until the population is under control. On day 3 the plants are putting out more pistils and seem to have stopped or slowed down their "stretch" phase. On day 4 I'm starting to see some trichomes forming on the sugar leaves, no smell that I can discern yet. I also changed out my reservoir and applied a BTI soil drench. On day 5 I adjusted the PH of my reservoir down to 6.1. I also purged my blumat system to make sure there are no clogs as my reservoir has fertilizer particles due to my water heater causing separation. I must keep the water heater on as I am growing in the northeast coming into the cold time of the year and can't have my reservoir freeze on me. On day 6 I adjusted the PH of my reservoir down to 6.1. On day 7 I adjusted PH in reservoir to 6.1.