12x25x 1/2 Half Inch Ring Panel MERV 12 Furnace Air Filters 6 Pack growing-media expanded volcanic rock

expanded volcanic rock

• High-pressure in-line pH probe with 3/4' NPT thread

InterLux™double ended bulbs are more effeciant by using the same wattage to produce higher par and lumen ratings

Weekly releases for 4 weeks

12x25x 1/2 Half Inch Ring Panel MERV 12 Furnace Air Filters 6 Pack growing-media expanded volcanic rockNordic 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