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Adjust PPM higher in later stages of the bloom cycle to desired strength
Comes with plastic stopper to secure the string at the desired length
Nordic Pure 16x25x5 1/4 Goodman/Carrier/Amana Replacement MERV 8 air filters are unique because of the actual size of the filter compared to the nominal size
optional cutoff tabs on the bottom corners for drainage
Harvest your entire crop without having to get the ladder
17x17x1 Exact MERV 8 AC Furnace Filters 6 Pack odor-control Adjust PPM higher in laterNordic Pure MERV 8 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 and other contaminants are removed. MERV 8 furnace filters are comparable to HVAC filters with the rating of MPR 800. While different companies use different scales to measure the air filters