This is when I start really dialing my setup and focusing on the metrics I want to chase. From here on out, I am targeting VPD and was hovering around 0.6 kPa. I don't really get the hang of my programming for my setup until week 4-ish.
I did end up adding an actual mini radiator heater to the tent around 12/30, and also sort of addressed an issue with my reservoirs not being quite level which was causing their water levels to be off.
This week is also when I realized my right plant is not quite growing at the same pace as my left one.