Ventilation

[KHAN]

Do you turn your intake fan & Carbon Filter off during the dark period of flowering or keep them on?

I've been keeping them on thinking it'll reduce humidity and bring in co2 is that right?

[stinkyattic]

Yes, keeping humidity low is especially important at night.
I keep my exhaust fans running, but not the fans that circulate air within the room.
How you set yours up depends on the space and your humidity levels.

[KHAN]

Thanks stinky I dont suppose you could tell me the right sort of flushing time for a grow using organic nutes and soil could you? Some say 7 days and some say 14days.. You have to put in 3 times the volume of the pots right?

[stinkyattic]

With organics, you really don't even need to worry yourself much about flushing. Simply switch to plain pH-appropriate tap water (check runoff pH to see if you need to adjust it at all), and run that for the last week or so.
It's the beauty of soil and organics... more art than science... :D