CO2 is an odorless, invisible, and non-flammable gas.  It is also safe for humans in the maximum concentrations recommended for plant growth.  The average level of CO2 in the atmosphere is about 300 PPM (parts per million). If the level decreases down below 200 PPM in an enclosed growing area, plant growth slows to a halt.  Through the years of testing and research, the optimum enrichment level of CO2 for plant growth has been agreed to be about 1500 PPM.  With CO2 enrichment, under good conditions, plant growth rates and flowering will increase 20-100%. CO2 can be used from seedling right through harvest.

The COREG is a replacement part for the HF COSYS.

Hydrofarm is the nation's oldest and largest manufacturer of hydroponics equipment and grow lights. You can find their products in hundreds of stores and catalogs across North America. Hydrofarm Quality: Their systems incorporate only premium quality components, and the professional-grade hydroponics and UL-listed lighting fixtures will give you years of dependable service. Hydrofarm Reputation: On the market since 1977, Hydrofarm brand products are the choice of more indoor gardeners and gardening retailers than all other brands combined.