12x16x1 MERV 13 Plus Carbon AC Furnace Filters 12 Pack grow-system/-trays/-reservoirs Control the light cycle in

Control the light cycle in your greenhouse & hoop house

tinkering around in tight places

ppm and temperature in the °C scale measurements

Can I use these in a hydroponic or soilless system

Suggested Uses: To control and kill indoor and outdoor pests on ornamentals

12x16x1 MERV 13 Plus Carbon AC Furnace Filters 12 Pack grow-system/-trays/-reservoirs Control the light cycle inNordic Pure pleated AC air filters are made of electrostatically charged synthetic materials that attract and capture most airborne particulates in your home or office. Each time air passes through a Nordic Pure pleated furnace filter, lint, household dust, pollen, dust mites, pet dander, baking flour, mold spores and other contaminants are removed. Our filter media prevents the growth of bacteria or mold, resulting in a much healthier living space.