12x20x1 Pleated MERV 14 Air Filters 3 Pack Grow Light Ballasts these devices accurately control water

these devices accurately control water variables with programmable hysteresis

Dimension (inch): 65 x 43

reliable and versatile: Combo Meter Plus means you will be able to measure more and build a better understanding of your complete growing system

Low ppm/EC and free of contaminants

12x20x1 Pleated MERV 14 Air Filters 3 Pack Grow Light Ballasts these devices accurately control waterNordic Pure MERV 14 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 14 furnace filters are comparable to HVAC filters with the rating of MPR 2800.