Effectively remove odors, heavy metals, discolorations, pollutants and organic contaminants with the Fluval Replacement Carbon. Fluval Carbon does not raise your tank’s phosphate levels and will leave your aquarium water sparkling and crystal clear. For filter models: 105, 205, 305, 405, FX5, 104, 204, 304, 404, 103, 203, 303, 403. Package includes 3 x 100g pouches. Call us at 1-800-277-9286 for more information about our products!