I think it's most significant benefits are when you have a room that runs pretty hot...80s+. Using co2 during the veg cycle can help the plants grow faster and bigger, so with the autos that can be nice since they need to use the time they have as efficiently as possible. The tnb naturals youtube page has some great videos, they're great because they don't generate heat the way other co2 products do. If you want an air tight room the co2 will make that possible. ✌️ good luck with the new addition to your setup.