20x24x4 (3 5/8) Furnace Air Filters MERV 12 Pleated Plus Carbon 6 Pack light-movers-hangers Discontinue use 1-2 weeks prior

Discontinue use 1-2 weeks prior to harvest for best results

Weather-resistant housing

Either formulation is top-notch

Make sure to run clean water through lines after every feeding

Storm flap over zipper adds an extra layer of protection

20x24x4 (3 5/8) Furnace Air Filters MERV 12 Pleated Plus Carbon 6 Pack light-movers-hangers Discontinue use 1-2 weeks priorNordic Pure 20x24x4 MERV 12 Pleated Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer. This results in less flow restriction and 33% more surface area for cleaner smelling air. It will help eliminate unwanted odors as well as trap most airborne dust and particulate matter for fresh, clean air. Odorous gases and vapors (VOC) are attracted to and held by the activated carbon