CO2 Injection Question

Here's a question. I'd like actual experience over educated guesses...

Can CO2 be injected into the water of a hydro system instead of simply releasing the gas into the air? Basically, you would keep the roots rich in CO2 in their confined space?

Here's a link that may explain this more clearly than I. I just want to know if anyone uses, or has used, this method of getting CO2 to your plants.

[The Krib] CO2 & Water Hardness

Thanks in advance.

Sorry if I'm being a little dense, but why would you inject it into the water? It wouldn't stay there, it would just bubble out. And if it did stay there, the roots use oxygen, not CO2.

CO2 is used by the plant and is taken in through the foliage. Used for photosysthesis, additions are beneficial only during lights on, and since CO2 is heavier than air, it is released above the plants.

HTH

Marijuana is NOT an aquatic plant.

There was some info @ greenmans page .com stating that Co2 would kill the root system. It was in their library under "make your own hydro system".