Very nice Diary and grow looks well. I see you say in week 4, your co2 ppm is 300? What reader you using if you don't mind me asking? Your ambient co2 in your area must be really low. Are you near the coast or a bit forest/Park?
Beautiful flowers!
How are you dealing with high humidity? 65% this late in flower?
Im facing same problem. Don't know if it's worth buying dehumidifier when I have exhaust pulling fresh humid air from outside anyways.
@Willy_Balls,
with high humidity in late flower i tend to defoil all lower foliage to increase airflow and reduce evaporation + best spread open all bigger buds every few days so moisture can't sit inside the bud