16_1/2x22x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack pumps-&-irrigation It will make plants stronger

It will make plants stronger and healthier and is ideal for after-planting stem cuttings when the first roots are visible

"I added these to my raised beds in early spring and by week three my tomatoes were already outpacing everything I'd grown before

while still maintaining excellent uniformity

vermiculite

leaves nearly zero oil traces

16_1/2x22x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack pumps-&-irrigation It will make plants strongerNordic 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