16_1/2x22x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack pumps-&-irrigation "I added these to my

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

vermiculite

Potent and powerful high phosphorus guano consciously extracted to not disturb the bat colonies and to provide an unparalleled completely natural source of phosphorus and calcium

while still maintaining excellent uniformity

Logging & measuring the different parameters affecting a crops success is fundamental in order to achieve maximum performance

16_1/2x22x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack pumps-&-irrigation "I added these to myNordic 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