21 1/2x23x1 Exact MERV 8 AC Furnace Filters 6 Pack LED The highly reflective material directs

The highly reflective material directs light downward

• Tap Line: #1 - 300 MCM

The level of your pH is an essential factor in deciding which nutrients are available for your plants to uptake

making it suitable for enclosed spaces including greenhouses and indoor grow rooms

Vineyards & Orchards – Use during bloom and fruit set on grapes

21 1/2x23x1 Exact MERV 8 AC Furnace Filters 6 Pack LED The highly reflective material directsNordic Pure MERV 8 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 8 furnace filters are comparable to HVAC filters with the rating of MPR 800. While different companies use different scales to measure the air filters