17x29x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Hydroponics add just 1 tablespoon per

add just 1 tablespoon per gallon of soil

Enhanced seed germination

The reflector is optimized and photometrically designed for an even commercial overlap pattern with a 136 degree aperture

A firm outer casing offers impact reduction for your meter

Pulls only 3 Amps at full pressure

17x29x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Hydroponics add just 1 tablespoon perNordic 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