8_7/8x19_1/8x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack beneficial microbes Use on all stages of

Use on all stages of plant growth from seedling through harvest

and can be used as needed

it should be used within a 10-12 hour period

Revered as the veg lamp of choice for over 15 years

8_7/8x19_1/8x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack beneficial microbes Use on all stages ofNordic Pure Custom MERV 7 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