Active Air-Timer Options:Hydrofarm CO2 (.2-2 cu ft per hour) with Timer • Made with Low Biuret

• Made with Low Biuret Urea

16” or 24” widths

both novice and experienced growers should recognize superior performance and outstanding results

follow the FoxFarm feeding schedule

Active Air-Timer Options:Hydrofarm CO2 (.2-2 cu ft per hour) with Timer • Made with Low BiuretDeliver 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.