23 1/2x25x1 Exact MERV 7 AC Furnace Filters 6 Pack grow-light-ballasts HI7031-023 is a GroLine 1

HI7031-023 is a GroLine 1

and amplifying aroma and flavour in all flowering and fruiting plants

10x higher concentration than the leading competitor

two 250 GPH pumps

Activating this culture will create 20x more product

23 1/2x25x1 Exact MERV 7 AC Furnace Filters 6 Pack grow-light-ballasts HI7031-023 is a GroLine 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