17x20x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack Master Controller General frequencies of use: Every

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

deep water culture

Multiple modes of action – smothers

which strongly correlates with soil moisture and nutrient levels

so adjust the watering frequency accordingly

17x20x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack Master Controller General frequencies of use: EveryNordic Pure pleated AC air filters are made of electrostatically charged synthetic materials that attract and capture most airborne particulates in your home or office. Each time air passes through a Nordic Pure pleated furnace filter, lint, household dust, pollen, dust mites, pet dander, baking flour, mold spores and other contaminants are removed. Our filter media prevents the growth of bacteria or mold, resulting in a much healthier living space.