Your 2 bobs are always respected. I already had rejected the plan to use it. Today, Scotty on Dude Grows, discussed exactly what you said. He says its basically pointless unless you can completely control the environment and that unless youre pushing <800 PPFD then its a waste of cash. I already believed you. I dont have nearly the setup to be trying CO2. I still have plenty to learn i reckon. I swear, some of this stuff, it seems i knew but forgot? Hell i dont know. Head injured and smoking hommade wax...Duh...