18x22x1 MERV 7 AC Furnace Filters 12 Pack hydro-x The SPYDR Series is purposefully

The SPYDR Series is purposefully designed for multi-tier cultivation – from veg to bloom – with PPFD up to 1

The high efficiency S4 spectrum provides ideal conditions for both human and plant health to deliver better working conditions and consistent crop quality

Includes a 12-foot corded sensor probe

• Required for nitrogen fixation and root nodules

18x22x1 MERV 7 AC Furnace Filters 12 Pack hydro-x The SPYDR Series is purposefullyNordic 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