any growers successfully using co2 in greenhouses?

anyone kept the heat down and used co2 in a greenhouse?
soil? hydro?
gas generator? container co2?
large increase in yeild since using the most intense light(sun)?
heat/humidity problems?

enritching to 1500 ppm will increase yeild alot

good luck, maybe at night with the fans off.

thanks guys. i know it will increase yields but how much say compared to indoor 20-30% yield increase. or is outside just 20-30% more as well (even though outdoor is higher yielding initially) or is it 40-60% more?

co2 use at night is a waste as the stomata which take in the co2 is closed and there is no photosynthesis going on to utilize any co2.

really? i did not know that, never used it myself, you obviously know much more about it than me. but you will need pretty still air to get the concentration high enough, though it will settle to the bottom.

Never grew outside with co2.I use co2 tank injection in my indoor grow with the 12 hours of light and it makes a for sure different but I would think in a green house lights on would be the same.I ve always read co2 increases yeild up to 80% indoors and then last 2 weeks an additive like molassases or sweet leaf or carbo load swells the buds up to 20%