We recommend measuring CO2 periodically to ensure optimum levels for growth. The CO2 Tester Kit is an inexpensive alternative to costly electronic monitors.

Features:

• Gauge proper CO2 level


• Eliminate waste and optimize growth


• Instructions included


• Inexpensive and easy-to-use!

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.