AC Infinity Activated Carbon Refill, 1200+ IAV Australian Charcoal, 32 lb.Description Premium Charcoal Granules: These granules are designed for refilling carbon filters to efficiently filter the air in your grow space. The product works by actively improving air quality and promoting cleaner ventilation. It efficiently blocks out odors and harmful chemicals. Increased Porosity: The increased porous surface of the charcoal granules adsorbs larger amounts of unwanted substances than typical pellets. This superior absorption