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I have never grown before (yet) , but i do remember seeing a high times growing video on youtube saying that CO2 is not nesseccary for marijuana. was this false information?

"what kind of MH light should i use for veg and how many watts?" I'm new here too daniel, but i will try to help you. I would say that one 400watt MH light, and 4 fluro bulbs would be enough for 18 plants. I have also heard that T5-48 fixtures are good for veging, and some people say they...