Are you looking for filter media for aquarium? This aquarium filter media is made of natural coral material for safe and practical to use. It can be used in seawater tank, fresh water tank, aquatic plant tank. And its strong filter ability and high density design can stable water quality and reduce fish died. Features -Color:Beige -Material:Coral -Size:4.00X1.50X1.50cm/1.57X0.59X0.59in -Note: Random size and shape. -Safe for aquatic fish, suitable for fresh and saltwater environments, will not harm your small fish. -This filter media can filter water, improve aquarium water quality, decompose impurities, stabilize PH -This filter media can help you to create a good living environment for fish, suitable for fish tank or aquarium -This set contains enough quantity of aquarium filter medians, versatile and practical to use -Though simple , it's so practical when you use it, easily create a clean water environment for , turtles and other pets Package list: 4 pcs x 1 Set of Coral Aquarium Filter Media 1 x Mesh Bag