17_1/4x19_1/4x1 Exact MERV 13 AC Furnace Filters 6 Pack veg nutrients All ood trays are BPA

All ood trays are BPA free

Simultaneous temperature display

Replace with the traditional lid when you are ready to start fruiting

Many PK boosters add far too much of these elements and create a cascade of problems

Dose rates above are not for use in CA

17_1/4x19_1/4x1 Exact MERV 13 AC Furnace Filters 6 Pack veg nutrients All ood trays are BPANordic 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