well My plants were having problems with leaves clawing and I tried everything from flushing to lowering the ppms. So I brought out the co2 tank and put it on every 15 minutes in a hour and they are looking better than ever. My room is 5x10 sealed other than a 6inch intake and 6 inch exhaust with booster fans. Now is it worth buying a generator and controls to keep my room at 500ppm co2 even though I have a 6 inch exhaust. I only want it for flowering and dont care that its being constantly sucked out. I have a ac vent in the closet from the central air conditioner. does anyone else do this. I cant have it completly sealed bc of security issues.