IrishAutogrow

@IrishAutogrow, yep ! always down to light and also the dark period is very important, same with temperature and temperature at night, also genetics , hope this helps 🚀

She looks great 😎

@MadeInGermany, thanking you kindly 😊

This only matters if you have a carbon, filter. What you want is negative pressure, what does that means? It means that your exhaust airflow (CFM / m³h) is greater than your intake airflow. If it were the other way around and the intake is greater than the exhaust (positive pressure), then the excess air would escape by any orifice and crevice it can find, bypassing the carbon filter.

I saw you had questions about a low yield.. My biggest effect on yield so far has been light.. Nutrients... Supplements.. None of it makes as much of a difference as a good proper intense light. https://www.youtube.com/watch?v=ID9rE5JewVg&fbclid=IwAR1aJjE1nHP84UftEchCSg5EDDgvxt3NaEMjWpmphatDh7ag24rwL9-z9m4&app=desktop

Thank you @@Darkwarsongs for your comment. The last yield I got was around 50g from one plant which I was somewhat happy with but it was just that the buds where airy and not dense😣. Is this still down to light?

Thank you @@Athos.. I've a carbon filter setup to eliminate the inevitable smell. In the long run, does negative pressure have any benifts or impacts to my overall harvest? I found from my last harvest had airy buds and wondered if the negative pressure would have prevented it...