if watering: no i doubt it, plants need oxygen around the roots & co2 for photosynthesis (around the leaves). co2 may rise up through the leaves from the soil, but not nearly enough to make a difference.
if you were to leave the open bottle in the room, it would increase the co2 but still not enough. a lot of people use sugar, yeast & water. as it produces co2 when its fermenting but unless you use loads that doesn't really make much difference either
dreadydrug Reviewed by dreadydrug on . Co2 alternative Can bubble/sparkling water be used as a co2 alternative? Iv hurd that people do this but is it beneficial? Does it really work? Thanks :) Rating: 5