20x20x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 6 Pack complete grow kit Use the tester kit to

Use the tester kit to gauge proper CO2 level

If the float valve stops operating

Microbes Grow Stage MICROBES are a specific group of Beneficial Bacteria and Fungi formulated specially for the Grow / Vegetative Stage of plants

It increases and stabilizes chlorophyll in plants

20x20x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 6 Pack complete grow kit Use the tester kit toNordic 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