18x24x4 (3 5/8) Pleated MERV 12 Air Filters 1 Pack Ventilation Comes with protective case and

Comes with protective case and calibration solution

Beneficial microbes do this by bonding with the plant’s roots to break down larger elements into simple chemical components that are easier for uptake and absorption

Ships Overnight Only

Spectrum: PhysioSpec Indoor™

Magnesium amino acid chelate

18x24x4 (3 5/8) Pleated MERV 12 Air Filters 1 Pack Ventilation Comes with protective case andNordic Pure 18x24x4 Pleated Air Filters MERV 12 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, virus carriers, bacteria, mold spores and other contaminants are removed. All Nordic Pure pleated air filters are manufactured using a heavy