12x26_1/2x1 Exact MERV 13 AC Furnace Filters 6 Pack AC / Dehumidification / Humidification then again in early August

then again in early August to interrupt multiple slug generations per season

the Advanced Quantum PAR Meter provides accurate and cost-effective measurement for all light sources used to grow plants

Visual LED alarm

It performs best in hydroponic systems and coco coir media

Chickadees

12x26_1/2x1 Exact MERV 13 AC Furnace Filters 6 Pack AC / Dehumidification / Humidification then again in early AugustNordic 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