18x18x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 12 Pack control system Hanging loops at top and

Hanging loops at top and bottom so you can flip entire unit for faster drying

ZeroTol HC is a broad-spectrum bactericide/fungicide peroxyacetic acid chemistry formulated with the smaller grower in mind

16 and 32 ounce

Bacillus laterosprorus

18x18x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 12 Pack control system Hanging loops at top andNordic 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