6x20x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack Grow Light Ballasts 6) to balance the pH

6) to balance the pH in your substrate

with an anodized brushed finish and CNC-machined detailing

nicotianae

features a powerful 4

Best used as a preventative & works better at lower temperatures than products that contain higher levels of Neem Oil

6x20x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack Grow Light Ballasts 6) to balance the pHNordic 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