16x24x4 (3 5/8) Pleated MERV 13 Air Filters 1 Pack spl_hlg General frequencies of use: Every

General frequencies of use: Every 12 weeks throughout the growing season

great for clones and seeds

Use Verde Fire Bloom to aid in the development of flowers

Fan Cooled

16x24x4 (3 5/8) Pleated MERV 13 Air Filters 1 Pack spl_hlg General frequencies of use: EveryNordic Pure 16x24x4 Pleated Air Filters MERV 13 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, smoke particles, smog, virus carriers, bacteria, mold spores and other contaminants are removed. All Nordic Pure pleated air filters are manufactured using a