Active Air-Timer Options:Hydrofarm CO2 (.2-2 cu ft per hour) with Timer both novice and experienced growers

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

The isopropyl helps prevent excess build up on the plant

Lost Coat Plant Therapy has been laboratory tested by CW Analytical (among others) and found to leave no residue

so you can be assured of a high quality product at a great price

Active Air-Timer Options:Hydrofarm CO2 (.2-2 cu ft per hour) with Timer both novice and experienced growersDeliver 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.