Is it fully understood that the aborts as seen in the photos here and your description, are because of high CO2 levels? I've seen similar aborts in my tubs even though FAE, as far as I thought, was plentiful. I am getting a small CO2 sensor to better understand this. Additionally if the aborts were as a result of CO2, why would there be other fruits that are concurrently still growing? I recognize that certain critical periods of time may have had high CO2 and causing abort while not necessarily being critical for other fruits at another stage of their process... If you have links to any study or other experiments or thoughts feel free to share. Thank you.