Aye,

CO2 is taken in through the leaves, high amounts of CO2 in the water will kill the plants!

Also CO2 weighs more then the air so best place to put the hose is directly over the plant/s or in the path of the fan blowing at the plant/s. I've even seen fans that blow straight up to push CO2 off the floor.

Roots need O2 NOT CO2
Vancefish Reviewed by Vancefish on . Co2 question? Hi brothers and sisters of the herb, I've just knocked up a co2 generator, the yiest, sugar and water method..I've put a air curtain on the end of the tubing and wrapped it around my fan. So my question is.. should i have put it into my resovoir or is it cool where it is now? peace! Rating: 5