20x20x1 Pleated Air Filters MERV 14 Plus Carbon 3 Pack LUXX Bar Optimized Phosphorus Utilization – Patented

20x20x1 Pleated Air Filters MERV 14 Plus Carbon 3 Pack LUXX Bar Optimized Phosphorus Utilization – Patented Optimized Phosphorus Utilization – Patented technology helps plants absorb and protect phosphorus sources for maximum reproductive output Silicator may be used in reservoirs during the flowering phase until two weeks before the final flush Nordic Pure MERV 14 Plus Carbon air filters work great in newer Nordic Pure 20x20x1 MERV 14 Plus Carbon air filters are made of electrostatically charged synthetic materials with an added flat panel infused with activated charcoal that attracts and capture most airborne particulates in your home