9x13x1 MERV 13 AC Furnace Filters 6 Pack hydro-systems Coco substrate is light and

Coco substrate is light and stable and is one of the best mediums for providing oxygen to the roots of growing plants

Dunks float in water and can be anchored with string to prevent them from being washed away

• Strikes both metal halide and high pressure sodium bulbs

2 mm minimum wall thickness

providing a frame that is up to 2-5x stronger than competing tent frames

9x13x1 MERV 13 AC Furnace Filters 6 Pack hydro-systems Coco substrate is light andNordic 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