16x21x1 MERV 13 Plus Carbon AC Furnace Filters 12 Pack X Nutrients bloom We recommend using this filter

We recommend using this filter in conjunction with our 10'' fan for optimum efficiency

Fish·Mix™boosts growth of all living organisms in the substrate

Mycorrhiza is a powerful root enhancer that occurs naturally in forest soils where the humus content is high and the soil is thriving with microbial life

Moderate Infestation/Speckling: 5+ per square foot

16x21x1 MERV 13 Plus Carbon AC Furnace Filters 12 Pack X Nutrients bloom We recommend using this filterNordic 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.