6x12x1 Exact MERV 13 AC Furnace Filters 6 Pack flowering nutrients • Vegetable crops: 2-4 weeks

• Vegetable crops: 2-4 weeks after emergence

It is fully compatible with the controller systems

Use Elite 91 FLOWERS with every feeding or nutrient change during the last two weeks of vegetative growth and for the entire bloom stage of plant growth

The fan uses a PWM-controlled EC motor that allows it to run efficiently and quietly at a maximum of 48 dBA

6x12x1 Exact MERV 13 AC Furnace Filters 6 Pack flowering nutrients • Vegetable crops: 2-4 weeksNordic 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