14x22x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack Master Controller pH the final nutrient solution

pH the final nutrient solution to 5

These bags are easy to install in place of your old hopper bag to get you back up and running as quickly as possible

full-spectrum light anywhere from 0% to 100% while maintaining efficiency

If you have Spider mites

14x22x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack Master Controller pH the final nutrient solutionNordic Pure Custom MERV 13 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