12x14x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack Hydro Systems apply every 7–14 days or

apply every 7–14 days or after significant rainfall

5 meters of 1/4"

Keep it Clean's main ingredient is Hydrogen Peroxide

Pre-harvest treatments with Clearex can enhance flavors and increase yields in fruits

Once applied to a growing medium

12x14x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack Hydro Systems apply every 7–14 days orNordic Pure Custom MERV 8 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition