20x24x4 (3 5/8) Pleated MERV 15 Air Filters 1 Pack Reflectors & Grow Lights When you use this potting

When you use this potting mix the miniature cubes stack on top of each other and air pockets are created throughout the pot

Provide increased plant vigor to withstand environmental stressors

RootShield Plus is also available in a granular formulation

May be added to solution or applied through foliar feeding

Heavy duty construction with galvanized steel

20x24x4 (3 5/8) Pleated MERV 15 Air Filters 1 Pack Reflectors & Grow Lights When you use this pottingNordic Pure 20x24x4 Pleated Air Filters MERV 15 are made of electrostatically charged synthetic materials that attract and capture most airborne particulates in your home. Each time air passes through a Nordic Pure pleated furnace filter, lint, household dust, pollen, dust mites, pet dander, smoke particles, smog, allergens, virus carriers, bacteria, mold spores and other contaminants are removed. All Nordic Pure pleated air filters are manufactured