Hey Guys!
To start, I will tell you about my configuration.
GrowBox: 120 * 80 cm
Light: CXM22 GEN 4 (50V), 9 COB's. 700W total (~ 600 net efficiency)
DWC hydroponic system. (1500 ppm now)
7 Bushes of various varieties. (5 week flowering now)
I decided to add CO2, but I do not have a sensor. How...