just a growing tip

[stinkyattic]

Oh, and CO2 isnt good for the roots, oxygen is

CO2 exists as a gas at room temperature. If your soil is as light as it should be, it should escape to the atmosphere where it is available to plants.
But I wouldn't use carbonated beverages on my plants because the pH is very low (Carbonic acid) until the C all comes out of solution.
I never said CO2 was good for roots!