18x24x 1/2 Half Inch Ring Panel MERV 13 Furnace Air Filters 12 Pack grow-light-ballasts Dimensions 20" x 20" x

Dimensions 20" x 20" x 10"

When diluted with water and sprayed on garden plants or ornamentals

To enter the setup mode the user presses a button located in the battery compartment

Guard ‘n Spray also effectively attacks mold and mildew spores

Use with CO2 regulator and tank to evenly distribute CO2 to your grow area and plants

18x24x 1/2 Half Inch Ring Panel MERV 13 Furnace Air Filters 12 Pack grow-light-ballasts Dimensions 20" x 20" xNordic Pure Half Inch Ring Panel AC Furnace Air Filters consist of an internal frame bonded between flat layers of two different types of electrostatically charged HVAC furnace filter media. The first layer is a high capacity, polyester filter material which acts as a pre filter, capturing large airborne particles. The second, more efficient, layer is a MERV rated smooth poly blend filter material. The electrostatic charge works as a magnet to draw in