Package Includes Submarine Aquarium Decoration x1 Realistic Submarine After connect this submarine with air pump (NOT Included), abundance bubbles erupt from the submarine, your aquariums fish tank will get wonderful landscape. Safe Material Our aquarium decoration is made of safe resin, non-toxic and safe for your fish. NOTE: You'd better soak it for 24 hours to clean the dust. Air Bubble Stone Included Comes with an air bubble stone, dissolve more air into water, produce a steady stream of micro bubbles, provide oxygen for fish to breathe while attached to an air pump (NOT Included), help circulate the water and improve the living conditions for your fish. Wide Application Suitable for fish tank, aquarium, home decoration, reptile decoration and house rockery landscaping, suitable for all kinds mini medium large aquarium tank.