What a fantastic job you've done on this grow! Its like they are all models on a display! Everything looks so uniform and perfect! That amber trichome shot was great! I'd be harvesting that little girl. I wouldn't really worry about the pistils to determine harvest time. Use the trichomes as your guide. It is much more accurate.
Next grow, measure your pH and PPM regularly when feeding and watering. That will give you an idea as to what the numbers.
Adding a pH up might have been a better solution to your low pH. Also, try to do slurry tests as well so you know what the pH and PPM of your soil is during the grow.
In all, this is a crazy good grow. I wish I was that neat!
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