13x21_3/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack ph-ec-tds-meters-and-solutions Our unique formula does not

Our unique formula does not stress the plant and will not damage flowers

50 million 1 Acre 2nd Day

activators or catalysts to produce synchronized and accelerated growth under all conditions

Hortilux's basic metal halide lamp series provide high initial and maintained lumen output

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13x21_3/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack ph-ec-tds-meters-and-solutions Our unique formula does notNordic 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