just get a co2 controller/indicator, it will help you dial in your ambient co2 level. if you grow in your house then you will find the correct conditions to keep it consistent without supplementation, i .e. keeping your window open 1 inch rather than 2 inches etc. once you do this you can keep the co2 constant at about 1200 parts per million. wonderful device.
MtnLionCO Reviewed by MtnLionCO on . Need Co2 advice Just picked up a tank of Co2 and a regulater and need to know when and how it will work best...setting etc. want to try to do it right the first time for sure.. lites run about 18 hours a day in this room. We strung some 3/16 hose into the T5 room and drilled holes about 2 inches apart under the T5..when would be the best time to run Co2 in this room ? also do we need to turn the fans and can fan off when we turn the Co2 on..? Main grow room under the 1000 sodium lite we where Rating: 5