Gard'nClean Fast Release Dry Gas Deep Deodorizer - 4K (4000 cu ft) cloning-and-seed-starting they also fit standard hydroponics

they also fit standard hydroponics trays for use indoors

Light-Tight Fabric and Zippers: Ensures complete darkness and odor control

A-OK Starter Plugs™ for starting seeds and rooting of cuttings prior to plugging into the larger Gro-Blocks

Each fan ensures safety

Gard'nClean Fast Release Dry Gas Deep Deodorizer - 4K (4000 cu ft) cloning-and-seed-starting they also fit standard hydroponicsThe GardnClean ClO2 Fast Release is a true dry gas fumigation for deeply sanitizing any space or environment This includes hard to reach areas such as microscopic openings on non sealed materials, HVAC ducting, electrical components, and much more. Due to the very small size of the chlorine dioxide molecule, it can easily penetrate into all of these spaces to eradicate the source of VOCs (Volatile Organic Compounds) and other compounds from deep