17_3/8x35x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack lighting 1-3 applications are usually required

1-3 applications are usually required depending upon infestation

After adding and stirring in each nutrient

The PhytoMAX-2 400 uses only the highest-quality

and flower stages

so you'll have 30 days of protection with each 2-pack

17_3/8x35x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack lighting 1-3 applications are usually requiredNordic Pure Custom MERV 10 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