24x30x2 Furnace Air Filters MERV 8 Pleated Plus Carbon 3 Pack lighting-systems/kits all while the Gro-Block Improved

all while the Gro-Block Improved maintains its structure

and prevents your nutrients from falling out of solution

Please avoid storing in direct sunlight and protect from freezing

Remote (detached) use of reflectors with Phantom ballasts from the 40 Series line should only be done with Hydrofarm brand reflectors having a built-in 15' cord

24x30x2 Furnace Air Filters MERV 8 Pleated Plus Carbon 3 Pack lighting-systems/kits all while the Gro-Block ImprovedNordic Pure 24x30x2 MERV 8 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer. This results in less flow restriction and 33% more surface area for cleaner smelling air. It will help eliminate unwanted odors as well as trap most airborne dust and particulate matter for fresh, clean air. Odorous gases and vapors (VOC) are attracted to and held by the activated carbon material