Nitrogen (N) is important for optimal growth of the crop. It is also important for the formation of chlorophyll for better photosynthesis.
When CO2 culturing, it is important that the plant can absorb sufficient nitrogen so that the plant can develop optimally.
In moderate deficiency: 0.75 ml to 1 liter.
In normal defect: 1 ml to 1 liter.
In severe deficiency: 2 ml to 1 liter.
Note: Only when one cultivates with co2 to use it !!