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These blocks have an excellent water absorption and (re)saturation rate and feature the exclusive Plant Comfort fibre structure which has a lower density of resistance during rooting with no loss of firmness
Horticulturally-optimized spectrum and increased UV promote enhanced plant quality
6" diameter flanges
When not in use
Heavy Metal Reduction: Reduces mercury
8x20x1 Furnace Air Filters MERV 12 Pleated Plus Carbon 2 Pack house and amp These blocks have an excellentNordic Pure 8x20x1 MERV 12 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
