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* Removable and washable filter
Designed to bring simplicity to pH testing of soil
the entire microbial matrix begins to work in concert to optimize plant growth
Highly recommend for anyone running bio-teas
14x25x 1/2 Half Inch Ring Panel MERV 12 Furnace Air Filters 12 Pack grow-light-reflectors * Removable and washable filterNordic 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