8_7/8x19_1/8x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack beneficial microbes and can be used as

and can be used as needed

AEROMIXER makes feeding large and smaller gardens a breeze and reduces the need for air stones

it should be used within a 10-12 hour period

1 x 24V Control Board

8_7/8x19_1/8x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack beneficial microbes and can be used asNordic Pure Custom MERV 7 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