Question about Nutrients and Autoflowering in a Deep Water Culture system

c10dores;1763640 said:

Can someone tell me how much CO2 is used if the tank only lets CO2 in for 15 min three times a day. How much CO2 do I use and how long will a 20lb tank last at this time frame. About 45 min per day. By the way, Auto Flowering is what I am growing.

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