16_3/8x21_3/8x1 Exact MERV 13 AC Furnace Filters 6 Pack Water Treatment This mat fits perfectly underneath

This mat fits perfectly underneath the two greenhouses

Week 1 – 10-12ml per gallon

The Zenport K141 heavy duty beet

Ducting Port Quantity: 8 (11" Double Cinching)

Use it indoors with grow lights or outdoors in natural light

16_3/8x21_3/8x1 Exact MERV 13 AC Furnace Filters 6 Pack Water Treatment This mat fits perfectly underneathNordic 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