22x29x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack Hydroponics Low Rate – Use the

Low Rate – Use the general rate above or release 1 beetle per 10 sq

The unique formulation promotes immediate uptake for hydration and nutrition

Short and open circuit

Adjustable wings for optimum light

22x29x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack Hydroponics Low Rate – Use theNordic Pure Custom MERV 12 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