I also set one up (home-made with yeast and sugar), and i think it can't be a bad thing to add.. after all plants use co2 to generate energy, and why not give them what they want to fatten up?
The fact that they can then endure higher temperatures and higher light-levels (PPFD) is just an advantage, and for the fact that it took me 10 minutes to make and i check every once in a while whether i need to re-fill my setup with yeast or sugar, that's a small effort to take that could have a big benefit..