jcardona1;4834715; said:It's only a myth for the guys that have never tried it before. They get all excited because they grow a few strands of some weedy plant. Ask anybody that actually uses co2 if it's a myth
You can grow several hardy plants w/o co2. Some of the nicer looking and more delicate species, not a chance. They'll wither away and die before you even know what happened.
YEAP .... There are some plants where Co2 is more important than LIGHTING for example HC (dwaft baby tears) Co2 is soo much more important than the lighting.
I would as already recommended stay away for HO BUT you maybe find some NormalOut Put lights. They'll be hard to find but are a better option.