Carbon Granular Activated Crystal Cal Laboratory-grade granular activated carbon Crystal Cal Granular Activated Carbon is will clear up your cloudy aquarium water overnight. Made specifically for aquarium water filtration, our laboratory-grade activated carbon features a sub-bituminous coal base with optimum pore structure to remove colors, tannins, odors, medications and other common organic waste contaminants. While most of the carbon sold for fish tanks is actually designed to treat air, Crystal Cal Granular Activated Carbon is washed and steam-activated to treat aquarium water, specifically. Unlike other common carbons or charcoals which can have high levels of contaminants that can leach into water, our carbon has low levels of dust and impurity extractables. Eliminates cloudy water in fresh, brackish and saltwater environmentsEffectively removes colors, odors, tannins, and organic waste productsFor use in all aquariums, tanks, and pondsWon't leach phosphate into your aquarium Fast-acting, Food Grade Carbon Higher performance than lignite, bituminous or coconut shell carbons Food grade carbon made according to Food Chemicals Codex (FCC) standards Large granules allow for great flow in any filter media bag, cartridge, reactor, or filter Highly effective in reactors, canister filters, intank filters or hanging filters High purity, phosphate-free production process Mix with Bayoxide GFO Phosphate Reducer for added algae reduction Premium Catalytic Carbon Bio Pellets HC GFO GFO Granular Activated Carbon Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Customer Reviews 3.9 out of 5 stars 27 4.3 out of 5 stars 238 4.6 out of 5 stars 160 4.4 out of 5 stars 471 4.6 out of 5 stars 1,340 Price $34.99$34.99 $56.99$56.99 $84.60$84.60 $39.68$39.68 $15.99$15.99 Usage Cartridges, Bags, RO Prefilter, Filter Systems Reactors Reactors, Socks, Canisters, Cartridges Reactors, Socks, Canisters, Cartridges Reactors, Socks, Canisters, Cartridges Water Freshwater & Tap Water Freshwater & Saltwater Saltwater Freshwater & Saltwater Freshwater & Saltwater Purpose Broad Organic Contaminant Reduction Reduces nitrates, phosphates, promotes clearer aquariums Reduces phosphates, promotes clearer aquariums Reduces phosphates, promotes clearer aquariums Eliminates Cloudiness and Odors About Kolar Labs Kolar Labs has set a new standard of success for improving water quality in aquatic environments for aquariums, ponds, and fisheries. Each innovation is designed with the customer and aquatic life in mind, and we place a large emphasis on performance and transparency. Founded in 2015, the Kolar Labs team has put their expertise to work to provide products that help hobbyists maintain ideal water conditions for freshwater and saltwater fish, plants, corals and invertebrates. Our unrivaled, water filtration technologies based on ion exchange, adsorption, and controlled release processes create filtration solutions without byproducts or harmful chemicals or user intervention. Instead, our products remove harmful substances that are already present in your water using our passive chemistry approach. We’ve done the work so you don’t have to. This leads to cleaner water for a healthier aquatic environment, with less maintenance for every experience level of aquarium owner. Purity You can See Crystal Cal Activated Carbon is manufactured by Calgon Carbon and specifically formulated for aquarium water filtration. It is made from a sub-bituminous coal base starting material that provides an optimum pore structure for the removal of colors, tannins, odors, medications and other common organic contaminants from aquariums and ponds. Because of this optimum pore structure Crystal Cal Activated Carbon has higher performance than lignite, bituminous or coconut shell carbons for removing common organic contaminants found in aquatic environments. Quality is Our Strength Crystal Cal Activated Carbon is highly effective in any filtration system you have in your tank, aquarium, or pond. Use in intank filters, canister filters, sumps, hanging filters, or reactors. The large granules allow for great flow in any filter media bag, filter sock, cartridge or filter housing. Mix the activated carbon with other medias such as Bayoxide E33 GFO Phosphate Reducer for added algae reduction. Crystal Cal Activated Carbon is a high performance, food grade carbon to keep water clear in your freshwater, marine, saltwater, or reef aquarium and your aquatic life healthy. Kolar Labs Premium Aquatic Solutions Kolar Labs has a comprehensive line of aquarium filtration products in sizes to suit your needs. Our filter media products are designed with the industry’s best chemistry proven to improve aquarium water, resulting in healthier fish and aquatic environments, and clearer aquariums with less maintenance.