Active Air-Timer lighting-accessories eliminating the need for constant

eliminating the need for constant adjustments

and potassium

The use of additional lamp extension cords

(100) Dart Dripper

and ethylene

Active Air-Timer lighting-accessories eliminating the need for constantDeliver growth boosting CO2 with our user friendly, easy to operate system. With its programmable timer, it will automatically maintain ideal CO2 levels for optimum growth. For small to medium size areas, select the COSYS; for larger than 10' x 10' areas, select the COSYS20. To use Hydrofarm's CO2 Flow Rate Calculator, click HERE NOTE: Current COSYS & COSYS20 now come equipped with a black rubber O ring that has replaced the white plastic washer.