17x25x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack microbes Created by Growers

Created by Growers

Stack helps correct minor potassium deficiencies

Extendable intake and exhaust hoses (up to 6')

it increases nutrient value

It allows more light to be absorbed even with a single 400-600W lamp to allow your plants to achieve their maximum natural photosynthetic power

17x25x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack microbes Created by GrowersNordic Pure Custom MERV 13 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