20x27x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack pumps-and-irrigation-supplies supports microbial diversity in your

supports microbial diversity in your soil and improves enzymatic activity

• Bluelab pH Meter (Item #BLU2320E)

Calibration is simple with one push button on the meter and fresh Bluelab Calibration Solutions

Both high and low level limits are user-adjustable to meet local regulations for supplemental CO2 use indoors

20x27x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack pumps-and-irrigation-supplies supports microbial diversity in yourNordic 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.