17_1/8x34_7/8x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack pumps-&-irrigation Hydroponic Systems: add 0

Hydroponic Systems: add 0

decreasing their efficiency and photon output

It provides odor neutralization for a room up to 10

mineral and mycorrhizae blend in it

This forms a physical barrier preventing root damage

17_1/8x34_7/8x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack pumps-&-irrigation Hydroponic Systems: add 0Nordic Pure Custom MERV 14 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