The benefits of increased carbon dioxide levels within a greenhouse are well known, and include earlier flowering, higher yields, improved stem strength, and larger flowers. With no set up or maintainence. The benefits of increased carbon dioxide levels within a greenhouse are well known, and include earlier flowering, higher yields, improved stem strength, and larger flowers. With no set up or maintenance, EZ CO2 is simple to use and less costly than tanks and generators allowing you to reap the benefits of increased CO2 PPM without any of the hassle of other methods. Our bags contain more medium, compared to others on the market, meaning you get more CO2 for your money. And EZ CO2 is completely self-sustained giving off no odors or heat. It's already giving off CO2 the moment you buy it, and continues to produce it for 6-8 months.