21x21x1 Exact MERV 13 AC Furnace Filters 6 Pack Sea Green Hydro - used for foliar feeding

- used for foliar feeding and pest/fungus control

These can be hung throughout the growing area to provide safe areas to hatch or move out in search of prey once released

The meter measures the soil conductivity in EC (mS/cm) as well as salt activity (g/L)

cutworms and tomato hornworms

carbon filter

21x21x1 Exact MERV 13 AC Furnace Filters 6 Pack Sea Green Hydro - used for foliar feedingNordic 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