20x28x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Gardening Accessories Big Rootz is pH-adjusted and

Big Rootz is pH-adjusted and enriched with mycorrhizae to maximize root growth

Light your way in and out of the grow room as well—the Cap Light is ideal for night runs

Choose high brightness LED as the light source

and equalize the osmotic differential in soil and soilless media by mediating more uniform moisture distribution

20x28x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Gardening Accessories Big Rootz is pH-adjusted andNordic 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