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

eliminating the need for constant adjustments

When odors

These products treat symptoms

and potassium

Flower Finisher is formulated for the unique needs of a plant during the final four weeks of flower development

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.