[jaafaman]

That's the thing, I'm not sure if carbonic acid is just a disposable bi-product of carbon dioxide diffusing into water, or if it's the actual fuel for the plants. I wouldn't think it would be, since emersed plants use straight carbon dioxide gas. You'd think that immersed plants would be the same.

But nature is a crazy beast, and you never know what she's gonna do.

What is the target product of biogenic decalcification?

And didn't Takashi Amano start out his CO2 experiments with carbonic acid (club soda)?...