17_1/8x34_7/8x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack X Nutrients Grow A optimizes vegetative development

Grow A optimizes vegetative development by helping the plant take in and break down nitrogen sources

Proven to stimulate more root growth

great for use with air or water

3" wide drill access points on all four walls for installation of inlet and outlet fittings

Display Panel – Shows fill

17_1/8x34_7/8x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack X Nutrients Grow A optimizes vegetative developmentNordic 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