Active Air-Timer


Deliver 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

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Need advice on which product is right for your project? We are happy to help in any way we can. Contact us and one of our garden professionals will get back to you as soon as possible. Contact Us.

Weight 4.3 lbs
Dimensions 8.8 × 9.8 × 6.9 in
638104200011 (UPC-A)
Weight 4.4 lbs
Dimensions 9.8 × 8.8 × 7 in
638104200059 (UPC-A)


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