8_7/8x33_5/8x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack microbes this formulation is ideal for

this formulation is ideal for growers looking for a general purpose medium which creates a well-balanced growing environment

or buildup of debris throughout projects

CalCarb foliar booster works great in both indoor and outdoor environments

Don’t Treat Your Soil Like Dirt

Light Output PPF 1600 µmol/s

8_7/8x33_5/8x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack microbes this formulation is ideal forNordic 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