17_1/8x26_1/2x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack ventilation which inhibits the future growth

which inhibits the future growth of fungi and bacteria

Our premium concentrated pH Up offers a clean formula for growers needing to safely increase the pH levels in their garden

special ingredients designed for immediate utilization by the plant provide balanced N-P-K

expanded volcanic rock

Beneficial for all gardening and landscape applications

17_1/8x26_1/2x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack ventilation which inhibits the future growthNordic Pure Custom MERV 13 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