12_1/8x15x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack DUCTWORK Provides a broad

Provides a broad

Monitor EC regularly and adjust accordingly based on the crop and growth stage

Precisely control photon output when paired with Autopilot PX series controller (PX2 and above)

The natural fungal spores in RootWeb bond to the root system of most plants

12_1/8x15x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack DUCTWORK Provides a broadNordic 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