22x29x1 MERV 13 AC Furnace Filters 6 Pack Hydroponics Do not refrigerate

Do not refrigerate

Includes raised platform insert and capillary matting allowing plants to self water for up to 14 days (subject to climate conditions)

The #4 is the largest perlite on the market and averages a whopping size of around 1 in

Onion Maggot (Delia antiqua)

Although there are small amounts of bat guano for microbial support

22x29x1 MERV 13 AC Furnace Filters 6 Pack Hydroponics Do not refrigerateNordic 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