ok, so I'm about to spring for a CO2 system. My grow room is 6'x3'x6'. the room it is located in is 10'x20'. I'm trying to decide between a tank or a generator. my grow room is pretty cramped so I was thinking going with a tank. but, it's not so air tight and I'm concerned with wasting my tanks and dosing the whole room. So, I like the idea of a generator (natural gass would be nice. but should I be concerned with raising the CO2 for the enitre room? health concerns? (my basement, not a living area, but I often spend an hour down there at a time) If no, what size generator would you suggest? many thanks as always!