Active Air CO2 System with Timer, 0.2-2 cu ft per hour GROWGANICA They have rubber feet to

They have rubber feet to reduce noise and vibration and come with a 120V power cord

• Naturally buffered

Built-in overflow system delivers excess water and nutrients straight to the rootball

Can be used in conventional or organic growing

Active Air CO2 System with Timer, 0.2-2 cu ft per hour GROWGANICA They have rubber feet toDescription User friendly CO2 system: Boost growth with our system. It features a programmable timer that automatically maintains ideal CO2 levels for optimum growth. For areas small to medium in size, select the COSYS. For areas larger than 10' x 10', select the COSYS20. CO2 Flow Rate Calculator: To use Hydrofarm's flow rate calculator, click HERE. Update on COSYS & COSYS20: Please note that current models now come equipped with a black rubber O