Keep in mind... unless you're at around 7,000+ lumens per square foot, and about 85-90 degrees fahrenheit, it's basically biologically impossible for the plant to benefit from increased levels of C02. They simply are not photosynthesizing fast enough if you have less light, and lower temperatures.

From my experience, in most grow cabinets/rooms... there is only enough light to allow the plants to photosynthesize normal levels of C02.
included Reviewed by included on . Clean way to add extra Co2? I tried baking soda and vinegar in the past and it made a merry mess. :( Still, when growing with LED's you need : more heat more Co2 less water less nutes My current cabinet is much smaller- 2' X 1' X 4' 8". and has an active air intake (camouflaged by a kitty litter box) so...what's a clean, safe way to increase Co2 levels? Does it really matter for such a small grow (2 plants in a small cabinet)? Rating: 5