I was not going to say anything more in this thread but you really put the cart WAY before the horse with that one guy. You should have invested in some true high quality lighting and in some decent growing containers of the proper size, one per plant, and in some reflective material better than white sheets, and in high quality soil (if you are not already using high quality soil) and in some high quality fertilizers/nutrients. A PH/EC/PPM/TDS meter would be of great help too. A scope, even a very basic inexpensive one like Radio Shack sells online for roughly $13.00 so you can check your trichomes so you can better judge when it is best to harvest,
IF you get lucky and manage to get to that point, would be really handy to have too.
http://www.radioshack.com/product/index.jsp?productId=2179604
As good as adding CO2 is it is about the last thing someone should do while building a growing system unless they are in a position to do it all, from A to Z, all at once before they begin growing. Without everything else that is vitally needed it is not going to make a tinkers damn of a difference in the success of a grow. CO2 is one of the bells and whistles that you add to an already quality growing setup, something you clearly do not have, and it then makes that quality growing setup better. But it will not make up for all the other things that are highly important and needed that have to come first if someone hopes to have any hope and chance of success.
Dude .. follow this link and read. It is an online growing book. I will not swear it is the ultimate source of all knowledge but it will help you.
http://books.google.ca/books?id=vrDRMU96oQEC&printsec=frontcover&dq=the+everything+marijuana+book&hl=en&ei=N9PuTIqRD4uWsgONnMzYCw&sa=X&oi=book_result&ct=result&resnum=1&ved=0CCkQ6AEwAA#v=onepage&q&f=false
Then try these. Some are only chapters of growing books dealing with specifics and others are large portions of books (various chapters spread out, unfortunately with some gaps, but still very helpful) and one or two might even be entire growing books. They will all come in handy at some point in time. (some may be duplicates since I do get overzealous in my bookmarking, sorry for any possible duplicates)
http://books.google.com/books?id=rnwwxoOb3gUC&pg=PA107&lpg=PA107&dq=marijuana+processes+sugar&source=bl&ots=6hTJh0Hzkt&sig=CGVqguXzPxsQm9OYrNSQ2TafMHY&hl=en&ei=Ea-_Soh0zt3xBvWW1b0B&sa=X&oi=book_result&ct=result&resnum=3#v=onepage&q=marijuana processes sugar&f=false
http://books.google.com/books?id=rnwwxoOb3gUC&pg=PA138&lpg=PA138&dq=steer+manure+marijuana+growing&source=bl&ots=6hRMiVBFfs&sig=oQ40S1oMm8mcfsReLNrn3pP9Nyk&hl=en&ei=tai8SZnRN860twfk2Z35Cw&sa=X&oi=book_result&resnum=7&ct=result#v=onepage&q&f=false
http://books.google.com/books?id=fERzFsZhdxYC&pg=PA184&lpg=PA184&dq=reflective+paint+marijuana&source=bl&ots=t0QwcwOJNv&sig=_Qa9SlUkXSjK8Y3_BM69tn8WJ90&hl=en&ei=-7mlSZPyDMyJngemovmVBQ&sa=X&oi=book_result&resnum=9&ct=result#v=onepage&q&f=false
http://books.google.com/books?id=fERzFsZhdxYC&pg=PA93&lpg=PA93&dq=marijuana+cystolith+hairs&source=bl&ots=t0SudrJCUs&sig=KI--F3ehBmtDc3AschoomAr4gNI&hl=en&ei=yg-5Sq6fI87VlAeuwaXIDg&sa=X&oi=book_result&ct=result&resnum=9#v=onepage&q&f=false
http://books.google.com/books?id=rnwwxoOb3gUC&pg=PA107&lpg=PA107&dq=marijuana+processes+sugar&source=bl&ots=6hTJh0Hzkt&sig=CGVqguXzPxsQm9OYrNSQ2TafMHY&hl=en&ei=Ea-_Soh0zt3xBvWW1b0B&sa=X&oi=book_result&ct=result&resnum=3#v=onepage&q=marijuana processes sugar&f=false
http://books.google.com/books?id=fERzFsZhdxYC&pg=PA170&lpg=PA170&dq=metal+halide+light+spectrum+marijuana&source=bl&ots=t0TsbtIJMm&sig=o7YrBJ0LnkA_2aGIcRaNT-nqBj4&hl=en&ei=KGEwS6CJApOIMofvlI0I&sa=X&oi=book_result&ct=result&resnum=9&ved=0CC0Q6AEwCDgK#v=onepage&q=metal halide light spectrum marijuana&f=false
http://books.google.com/books?id=LvnxcADQnCUC&pg=PA125&lpg=PA125&dq=metal+halide+light+spectrum+marijuana&source=bl&ots=PWIywJ6nt4&sig=JMYNCEocxisUtRP7pkf9bampzQw&hl=en&ei=j2IwS7XjCZL-M_C37NwP&sa=X&oi=book_result&ct=result&resnum=10&ved=0CCYQ6AEwCTgU#v=onepage&q=metal halide light spectrum marijuana&f=false
http://books.google.com/books?id=YbBYBT1HZgYC&pg=PA292&lpg=PA292&dq=cannabinoids+explained&source=bl&ots=MjBiFi9Xix&sig=CN4ce4fwd-QE1nR841QU8mpdaLc&hl=en&ei=_m8mTKgLg_qXB4ygsc8D&sa=X&oi=book_result&ct=result&resnum=5&ved=0CCgQ6AEwBA#v=onepage&q=cannabinoids explained&f=false
http://books.google.com/books?id=_aK7dTNS1qkC&pg=PA16&lpg=PA16&dq=what+happens+to+cannabinoid+production+when+plants+are+pollinated&source=bl&ots=A_IiGy64G0&sig=8QrCxuIWTMY7-03thT6B-GNKV7c&hl=en&ei=9LUkTKCaLIG8lQfPloW2Aw&sa=X&oi=book_result&ct=result&resnum=1&ved=0CBIQ6AEwAA#v=onepage&q&f=false
http://books.google.com/books?id=JvIyVk2IL_sC&pg=PA7&lpg=PA7&dq=terpenoid+production+in+cannabis+plants&source=bl&ots=AAnNtauOhK&sig=i8Esxs8Oeo97sLC-23rdxVEQ-L0&hl=en&ei=vMUnTJvZIMTflgeA9bjsAg&sa=X&oi=book_result&ct=result&resnum=8&ved=0CDAQ6AEwBw#v=onepage&q=terpenoid production in cannabis plants&f=false
http://books.google.com/books?id=7FJqgQ3_tnUC&pg=PA140&lpg=PA140&dq=terpenoid+production+cannabis+plants&source=bl&ots=QsNArFX9P3&sig=1wrsmsOrV28seMQoPUiBYoQJ1FY&hl=en&ei=8dMnTJnKIcT7lwer8fmaAw&sa=X&oi=book_result&ct=result&resnum=8&ved=0CDQQ6AEwBzge#v=onepage&q=terpenoid production cannabis plants&f=false
And try this .. some good information can be found there. I would not swear each piece of advice is the very best, but much of it is good and it's a heck of a lot better than having nothing to go by at all.
http://www.mellowgold.com/grow/mjbotany-removed/
For general lighting information that touches on various different forms of lighting and what they will give you, go here.
http://forum.grasscity.com/absolute-beginners/564033-lighting-guide.html
For more information go here, pick a topic and click on the link. Again I will not swear that every single bit of information is 100% the very best, but again, it is a heck of a lot better to have to go by than what you now have and how you are trying to find information.
http://www.420magazine.com/forums/frequently-asked-questions/83112-how-grow-cannabis-everything-you-need-know.html
Use these resources FIRST and you will avoid the tsunami of attitude you are getting from people here, and then returning it to them in spades. You will avoid the opinions, most of which are not all that valid, and the assumptions that are based on God only knows what.
Sites like this may seem like storehouses of knowledge too you but for the most part they are universities of ignorance where the blind lead the blind and pass on misconceptions, half-truths, partial facts, total inaccuracies, myths, urban legends and old hippie folklore.
Try to find as many answers to your questions as you possibly can from highly educated people whose life it is to study cannabis plants and who will give you facts, real true facts, actual botanical knowledge and you will be far better off than relying on ANY site like this for all you need.
Good luck ..... based on what you have written so far ...... all I can say is that you are going to need all of it that you can get!