20x25x2 Pleated MERV 7 Air Filters 12 Pack PPE including a selectable EC to

including a selectable EC to TDS conversion factor (0

Comes in 250 foot roll

is well suited as a mix-in element with other growth mediums

Gives your plants a micro-climate zone allowing you to grow crops that are not hardy in your planting zone

20x25x2 Pleated MERV 7 Air Filters 12 Pack PPE including a selectable EC toNordic 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