Man this co2 is amazing! Such explosive growth from both strains it's great. The auto is shooting to the light, been topping off res every 2 days the base stem in about half an inch or more and showing some nice pistons. From the Fcj they've been good, one has finally began to stretch it's height and catching great light. As for the other one which has had its troubles with leaf necrosis is still a little behind from the main one usually catches up after a day or two, still very bushy and I accidently pinched off a very beautiful fan leaf from the top growth today , I hope it doesn't disturb her too much, I just hate to set back her growth right now at all.