12x26_1/2x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Grow1 5' Steel Stake - Adjustable separate set points

- Adjustable separate set points for day and night from 0 to 4

Beneficial Microorganisms (phosphorus-solubilizing & composting bacteria)

(4) RAW Calcium/Mag - 2 oz

Flood & drain systems work by pumping nutrient solution up from a reservoir to a controlled water level tray

12x26_1/2x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Grow1 5' Steel Stake - Adjustable separate set pointsNordic 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