Ah I see. I was thinking about going hydro. Aeroponic style. My first grow was that way. But I like organic and I was told that organics and hydro don't work to well together. Correct me if I'm wrong.
I basicly just want to run a little bit of co2 to pass threw the room. It's not sealed so I wouldn't be pumping a huge amount in there. Just enough to bring the co2 level up a bit.So a tank would be a waste of money.
I thin k I'll try it without co2 for a few weeks. And see if it slows things down. But not till I start my vegging girls.
Right now I'm using the CO2 Boost and it works pretty well. I just wanted something more perminent.