12x24x4 (3 5/8) Pleated MERV 7 Air Filters 2 Pack Gardening Accessories Coverage Rate: One bottle covers

Coverage Rate: One bottle covers up to 1

It's specifically designed to protect beneficial bacteria in organic compost

Color-coded LED display indicator

The Matrix is reusable and can sit on top of or fit into your pot

12x24x4 (3 5/8) Pleated MERV 7 Air Filters 2 Pack Gardening Accessories Coverage Rate: One bottle coversNordic Pure 12x24x4 Pleated Air Filters MERV 7 are made of electrostatically charged synthetic materials that attract and capture most airborne particulates in your home. Each time air passes through a Nordic Pure pleated furnace filter, lint, household dust, pollen, dust mites, pet dander, bacteria, mold spores and other contaminants are removed. All Nordic Pure pleated air filters are manufactured using a heavy duty, moisture resistant beverage