QAN1002 Features: * Sand * For marine aquariums * Helps maintain a proper pH for the life of your aquarium without the constant addition of chemicals * Creates a biological balance to discourage nuisance algae * Minimum order: 2 * Graded aragonite sand nitrifying bacteria Color/Finish: * Color: Black Dimensions: * Weight: 20 lbs * Dimensions: 2"" H x 13"" W x 20"" D