20x23x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack soil Each of the two-lighting group

Each of the two-lighting group channels has a room overheat protection function that can be set as needed

The bags have pre-punched holes for easy draining and stand upright when filled with media

240μmol/s

Microbial Soil Inoculant has been specifically formulated to enhance nutrient uptake in ornamentals

A minimum of 3 shipments is required for the program

20x23x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack soil Each of the two-lighting groupNordic 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