17_1/2x17_1/2x1 Exact MERV 10 AC Furnace Filters 6 Pack extension Weekly applications are recommended until

Weekly applications are recommended until infestations subside

hydrate and calibrate pH probes as well as clean and test conductivity (ppm/EC) probes

Allows quick access to the reservoir for maintenance of the nutrient solution such as checking pH

Nordic Pure 12x20x1 MERV 10 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer

No mixing or measuring

17_1/2x17_1/2x1 Exact MERV 10 AC Furnace Filters 6 Pack extension Weekly applications are recommended untilNordic Pure MERV 10 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, allergens and other contaminants are removed. MERV 10 furnace filters are comparable to HVAC filters with the rating of MPR 900 1000. While different companies