13x25x1 MERV 7 AC Furnace Filters 6 Pack spl_nextlight increments from 1/4 - 1

increments from 1/4 - 1 oz

1 Gallon Concentrate makes 5 Ready to Use Gallons

and best yields with the 26-Site Super Flow Hydroponic Grow System

PPM settings for tomatoes

This software can also data-log or chart a grow room's environmental conditions

13x25x1 MERV 7 AC Furnace Filters 6 Pack spl_nextlight increments from 1/4 - 1Nordic Pure MERV 7 Pleated AC Furnace Air Filters provide exceptional filtration for both home and commercial environments. Each time air passes through a Nordic Pure pleated furnace air filter, lint, dust, pollen, bacteria, pet dander, dust mites, mold spores and other contaminants are removed. MERV 7 furnace filters are comparable to HVAC filters with the rating of MPR 600. While different companies use different scales to measure the air filters