Well i dont run a CO2 setup myself but looking at others threads that do it seems to do wonders.

My local hydro shop tells me it increases yeilds up to 50% (but hes selling it so no-telling if he is exaggerating.

The only advice i can give (because i dont run one) is that you should get a controller.
Its expensive, which is why i havent gotten one yet, but its to make everything simple and it does everything for you, it will adjust itself and make everythingg much easier.
superskunk1 Reviewed by superskunk1 on . CO2 in Growtent??? I have read a lot about CO2 being the "bees knees" when it comes to growing.. read in two books that it increases the yeild by 20-30%.. and in other places i have read that it does even more.. Has anyone used CO2 and can shed some light on this?? i was thinking of getting a system... was also checking to see if anyone has any recomendations on the besyt sytem.. i.e. a tank or one of those CO2 tablets that you get in a premaid CO2 bucket thingy you see for sale on the internet.. all advice s Rating: 5