28x34x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack spl-athena making it an excellent choice

making it an excellent choice for a variety of applications as well as a superior bloom formula for all fruiting and flowering plants

we have determined that the best results with these biologically active media will be obtained by a smart combination of mineral and organic nutrients

There are exceptions depending on the compound being oxidized

Maximizes your germination success and great for seedlings

saving you money on utilities and costly maintenance

28x34x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack spl-athena making it an excellent choiceNordic 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