I’m thinking about adding bottles co2 system. I have all of the basic equipment. Curious where is best place to hang discharge lines for the system? One tune it was suggested to hang from light reflector. I’m running 600 watts lamps in 8x8 tent. I have the titan atlas 8 controller. Asking for experienced suggestions only
I’ve only tried the bagged stuff, which I couldn’t see much if any diffference with. And was told to hang it higher than the plants or behind a fan thats blowing gently on the plants cuz co2 is heavier than air & wants to flow downwards. Also to run the tanks only when the light is on (but I didn’t use tanks) because the plant only sucks it up in daylight. My problem could have also been that I didn’t have a powerful enough light to benifit from the extra co2. I’m a newbie so wait for others to post about this before wasting any energy on what I have said.
Edit:Sorry just noticed experienced only & I don’t consider myself experienced as of yet
You can and should use (sealed) air cooled HPS fixtures that are ducted to an entirely different space than the plants. You should have more light than that to justify supplemental CO2 above ambient atmospheric levels. It’s your money, and you already own an expensive controller (I’m assuming you own a regulator with solenoid). I wouldn’t worry about going over 800ppm at your current level of lighting.
As far as positioning the gas outlet, it shouldn’t really matter, since a gas will expand to fill the volume of it’s vessel. Critically, you’ll want to make sure you have the Goldilocks amount of air movement. You need air moving over and under your fan leaves without it being too strong.
You’ll still want to ventilate the tent during lights out and for a few hours after lights on. You would not supplement CO2 from a bottle while venting.
CO2 is really the last consideration I’d make in a home grow. You gain more by dialing in light and VPD first. I’d let @dbrn32 assess your lighting plan.