I just have a .5l bottle brewing yeast. I get supermarket stuffs for cheap so it cost me next to nothing and figured it couldn't hurt. From what I've read I apparently don't have anywhere near enough lumens to max out the plant with ambient co2 levels so it couldn't possibly use the extra co2..although maybe extra concentration allows it to be more readily absorbed? No way to know for sure without testing tons of plants so chances are it probably does more for me than the girls lol.






