17_1/8x26_1/2x1 MERV 13 AC Furnace Filters 6 Pack HVAC & HOME VENTILATION so recommended flood tray sizes

so recommended flood tray sizes are 2′ x 2′ trays for the 3′ x 3′ tent

Perfect for the gardener with limited space

Important Note: Almost all furnace air filters have a different Actual Size (the exact dimensions) than Nominal Size (the name)

Protects Beneficial Microbes – Preserves the living biology in your root zone and growing media

Varia requires a proper use of the substrate since oxygen goes through the substrate itself

17_1/8x26_1/2x1 MERV 13 AC Furnace Filters 6 Pack HVAC & HOME VENTILATION so recommended flood tray sizesNordic 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