New Grow Co2

[High grade stoner]

Hey ... Just started a new grow of 23 plants... Installed a Unis Co2 Controller With Co2 tank.. How long should co2 be on for ? The co2 controller Comes on every 4 mins For the setting i have it on realeses co2 for about 15 seconds

[Wantukcheese]

best to buy a ppm sensor and chose exactly how much Co2 you want in the room, between 1500 and 2000.