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Calibration and conductivity standard solutions
Allow for 10 – 25% runoff for best results
Photos shown may not be actual product
Can be used in all growing media
Use SuperCharge in all your hydroponics and soil growing methods
17x29x1 Exact MERV 13 AC Furnace Filters 6 Pack flowering Calibration and conductivity standard solutionsNordic Pure MERV 13 Pleated AC Furnace Air Filters provide exceptional filtration for both home and commercial environments. Each time air passes through a Nordic Pure pleated furnace air filter, lint, dust, pollen, bacteria, pet dander, dust mites, mold spores, smoke particles, virus carriers, coughs and sneezes, smog, allergens and other contaminants are removed. MERV 13 furnace filters are comparable to HVAC filters with the rating of MPR 2200
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