16x26x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack grow-systems-trays-reservoirs Containing long life dual ball

Containing long life dual ball bearings

Sodium Bicarbonate (baking soda)

- Calcium – is essential to keeping plants healthy

Coating the plant in any oil can suffocate the plant by covering the Stoma openings that the leaf uses to breath

The HLG BlackBird is the first one that actually lives up to the spec sheet

16x26x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack grow-systems-trays-reservoirs Containing long life dual ballNordic Pure Custom MERV 8 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