13x23x1 MERV 13 AC Furnace Filters 6 Pack Travel Bags & Backpacks Proper pH is vital for

Proper pH is vital for healthy plant life

Ducting Size: 10” | Length: 25 feet | Includes two stainless steel 10" duct clamps

University of Rochester

Perfect for vertical farms and vegetative stages of plant cycle

We tend not to notice them because they are dark blue in color and look like large flies

13x23x1 MERV 13 AC Furnace Filters 6 Pack Travel Bags & Backpacks Proper pH is vital forNordic Pure MERV 13 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, smoke particles, virus carriers, coughs and sneezes, smog, allergens and other contaminants are removed. MERV 13 furnace filters are comparable to HVAC filters with the rating of MPR 2200