28x34x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack Cloning & Seed Starting Growth Science® Base A contains

Growth Science® Base A contains nitrogen and key micronutrients like calcium and magnesium to support essential plant function and encourage vegetative growth

- Maximum weight capacity: 2

41 mS/cm or 5

8 x Quickfill™ Bag | 1 gal (case)

Force of Nature Fungicide has shown the ability in replicated field and greenhouse trials to control Powdery Mildew for 7-10 days with a 1% spray solution

28x34x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack Cloning & Seed Starting Growth Science® Base A containsNordic 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