Im new to growing and have done my best to spare no expense when it came to the setup for my girls the only thing i havnt bothered with is Co2. I have looked into it and there are quite a few different methods of delivery the most appealing being the Co2 tabs that dissolve in water purely for the price but info on them is vague and gives no indication of how long they last or how much Co2 they give off, another method that caught my eye was the bucket that was available on ebay but the refills cost almost the same as the initial set up. so would i be better off buying a full cannister system in the long run or most importantly is it worth me having Co2 at all??