I can't really answer that for a number of reasons. The main one is that to gain the full effect from the co2, every other aspect of your growroom has to be dialed in perfectly. For example, if you don't have enough light, then the plants will not use up the extra co2 that you pump in. If the temperature is too high (even though you need higher temps to utilize the co2) or too low then the same thing. If your nute levels are too low the same.

So you can raise the levels of co2 in your room but if any other aspect is too low then the co2 is wasted. That is why a lot of people say to first get your room perfect then add co2 as a final piece of the puzzle.

Personally I can't justify the extra cost for my room either. I just run my ventilation 24/7.
Perp Reviewed by Perp on . HELP ME GET THIS GOING I NEED THE PROS TO TELL ME WHATS UP Startin it up I want help form all the pros I been watching give me feedback the clock is ticking and I want this shit going. PLEASE GIVE ME ALL THE FEEDBACK WANTED IF YOU HAVE ANY INFO ON ANY OF THE EQIUIPMENT, KNOW A GOOD METHODs( I LOVE DIY`S). ANYTHING I AM OPENED TO ANYTHING AND EVERYTHING AND LOVE TO OFFER AS MUCH HELP AS POSSIBLE IF I HAVE USED OR EXPERIECNED SOME THING IN THE SAME. Well after compelting a full cycle to reap no fruits of my labor due to what I believe is bad karma Rating: 5