9_3/4x23_3/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack nutrients-and-supplements large amounts of potassium are

large amounts of potassium are quickly used by the plant

and seedlings

Ideal for growers using aeroponic EZ-Clone machines

and a mixture of additional high-quality dry amendments

reproduction

9_3/4x23_3/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack nutrients-and-supplements large amounts of potassium areNordic 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