21x21x1 Exact MERV 13 AC Furnace Filters 6 Pack Growing Accessories Our 2 part system is

Our 2 part system is highly concentrated to save you money while also providing all the necessary nutrients to your plants

Case of 200

pesticides and agrochemical fumigants

Citric Acid lies below 4

Quick Calibration Mode using Hanna Quick Cal pH/EC Calibration Solution

21x21x1 Exact MERV 13 AC Furnace Filters 6 Pack Growing Accessories Our 2 part system isNordic 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