Description
22x29x1 MERV 14 AC Furnace Filters 6 Pack spl_hrg Nordic Pure 16x24x1 MERV 8 Nordic Pure 16x24x1 MERV 8 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer The fungus actively grows with and protects roots if the soil pH is maintained between 4