Yeah ihave been running C02 for most of the grow. I do have a regulator but i do not have a brain. I just set mine up to turn on 15mins every hour while lights are on. Seems to work great. Not sure about PPM but it doesnt seem to be hurting them.
GODDAMN that shit looks GREAT! i cant wait to see her finish up, gonna be realllllll chunky!
I just smoked my leaves off my roadrunner and im hella faded, havent smoked in monthsssss haha