20x21_1/2x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Lamps It can be mixed with

It can be mixed with potting soil

Two mounting kits are included with each controller

odorless formula won't affect air quality or plant health indoors

Vermicrop hopes your final product will be as fiery as theirs

20x21_1/2x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Lamps It can be mixed withNordic 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