Don't under estamate a homemade co2 unit a simple bottle with yeast in is all i have in my cloneing room in fact i have 3 each mix last about a week this has made clones look far happyer.got the idea of the aqua section on you tube. Got flack for it but i have 100% success with this little added touch.plants can be happywith air the fan creates co2 gearators are takeing it to another level.Don't get me wrong i have a co2 burner now for my to growrooms but all it means is you can match the parts per million to your co2 and let the temp rise.But any newbies reading you can still get great yeileds without a co2 gearator.But good on you for makeing one nice one try matching the parts per millon to the co2 you want it around 650/700ppm