15x20x2 Furnace Air Filters MERV 10 Pleated Plus Carbon 12 Pack spl_hi If adding to an irrigation

If adding to an irrigation system strain out any of the packing Material and remove any fine filters to allow the nematodes to travel through the system

Where other rockwool brand manufacturers cut all sizes from one batch of wool

If these food sources are not available

Set sizes available: 8

15x20x2 Furnace Air Filters MERV 10 Pleated Plus Carbon 12 Pack spl_hi If adding to an irrigationNordic Pure 15x20x2 MERV 10 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 material