20x30x1 Furnace Air Filters MERV 8 Pleated Plus Carbon 3 Pack Grow Strong • Fully heat-treated

• Fully heat-treated

water only when the soil is slightly dry to the touch

helping to extend the life of your primary FR clothing

for heavy infestations

helping to make your next grow the best it can be

20x30x1 Furnace Air Filters MERV 8 Pleated Plus Carbon 3 Pack Grow Strong • Fully heat-treatedNordic Pure 20x30x1 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. 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