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...
stinkyattic Reviewed by stinkyattic on . Ventilation 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? Rating: 5