haha that guys funny! thanks for the video.. yeah ill talk to some people and look more into this 1800 ppm for CO2. i pretty much do everything he says to do except i seem to have more success with GH over Advance NutrientsI used to keep it between 1200-1500, but then I saw the Urban Growers' buds that he grew at 1800 and I was convinced. YouTube - Mailbag
He talks about how to get 2+ lbs. per 1000 watt light. Look at the buds he shows at the end. Holly Crap!!!
I think your method is correct.if i'm not mistaken, an and gh are the EXACT same formula....
that was great! the only thing i wonder about is the amount of co2. he didn't explain how he uses it from start to finish.
as far as i know, you'd be at 1000ppm when you initiate flower, then up to 1400 after two weeks, then 1600 halfway, then 1800 for the last remaining weeks.
anyway, don't rely on my info here, i use homemade co2 tanks, and i can't measure how much... this info came from a friend in cali.
kp