PLEASE VISIT US ONLINE AT WWW.PURELYH2O.COM4 LBS ACTIVATED LIGNITE AQUARIUM CARBON(1 GALLON)LIGNITE CARBON PurelyH2O Activated Premium Lignite Carbon comes in Medium size Particles. Medium size particles are easier to work with, while at the same time are slightly more efficient. LIGNITE CARBON This American made lignite low iodine carbon will remove coloring, pollutants, and medications from the water.Features and benefits: Better performance then name brand carbons Crystal clear water A healthier tank very effective aquarium tank clarifying carbonPurelyH2O Activated Lignite Carbon comes in Medium size Particles. Medium size particles are easier to work with, while at the same time are substantially more efficient. Lignite Carbon Specs Molasses Decolorizing efficiency 85 MIN Dust% 0.40 Max Iodine Number 600 Surface Area M2/g 650 Total pore Volume mL/g 0.95 Washed with Hydrochloric Acid Food Chemical Codex Passes About Purely H2O Activated Lignite Carbon...Purelyh2o.com Activated Lignite Carbon is an extremely high quality carbon specifically designed for salt and freshwater aquarium filtration at an affordable price.This American made carbon will remove coloring, pollutants, and medications from the water.Features and benefits:Better performance then name brand carbons Crystal clear water A healthier tank See below for a detailed descriptionPH2O Activated Lignite Carbon Low Iodine content with the following benefits:Easier to use & more effective then Activated Bituminous Carbon, Lignite Carbon will outperform competing brands for much less. The primary function of carbon is to remove color pigments, pollutants, and medications from an aquarium. Each has a larger molecule structure and requires a carbon with a pore size large enough to effectively remove them. Our Activated Lignite Carbon contains a high number of large pores capable of removing these molecules.We purchase our carbon directly from the manufacturer so we can offer the best carbon at reasonable prices. While most companies claim their carbon is the best, our statement is backed with True Scientific documentation and real numbers. 4 FULL POUNDS AQUARIUM PREMIUM ACTIVATED LIGNITE CARBON