its all good man ive grown outside but never did hydro or rw so just a little worried. as for the co2 i know its jumping into it ive put in alot of time reading and running test on everything i can think of to see if i can do before i even started it was like a month before i planted.i can understand about the co2 thing and alot of my friends have not done good with it, but they didnt take care of it and just didnt care. this is what i do and am in college trying to take hort. somewere. now i dont mean to sound like a dick i do thank u for all ur help