14_1/2x19x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack PH/EC/TDS Meters and Solutions NEW for 2018 is the

NEW for 2018 is the OG DE1000W fixture

Great White Granular 1 adds beneficial microorganisms to the root zone to enhance plant vigor and is OMRI AND OIM certified

These chrome air dividers feature individual valves to control each outlet and have an inlet which accepts 3/8" inner diameter hosing

Ascorbic Acid

control & monitor your plant health & performance

14_1/2x19x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack PH/EC/TDS Meters and Solutions NEW for 2018 is theNordic 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