Excellent imitation rock, artificial stone with algae, transforms your aquarium into a beautiful scene. Provides beautiful decoration for the aquarium, and is also an excellent hiding place for fish, adding extra fun in play. This rock is made from advanced resin with high resistance to acids and corrosion, it is non-polluting and non-radioactive, etc. Suitable for both saltwater and freshwater. Completely safe for fish, it will not die, rot, or cause algae Disorders. Suction cups can be fixed at the bottom/side of the water tank to create a natural landscape.