10x30x 1/2 Half Inch Ring Panel MERV 12 Furnace Air Filters 6 Pack Fertilizer This CO2 controller can accurately

This CO2 controller can accurately monitor room CO2 levels and turn CO2 regulators or generators on and off

four (4) 120V outputs

To re-stock your pH & conductivity probe care kit

Replaceable Membranes

10x30x 1/2 Half Inch Ring Panel MERV 12 Furnace Air Filters 6 Pack Fertilizer This CO2 controller can accuratelyNordic 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