PURPOSE: An oxygen supply tube for decorating an aquarium is provided to enable a user to cultivate artificial water grass or real water grass.CONSTITUTION: An oxygen supply tube for decorating an aquarium comprises a transparent tube(A1) in which a color is injected. In the transparent tube, a suitable color is injected in order to express a color similar to the environment of the aquarium. On the surface of the transparent tube, real water grass is cultivated.COPYRIGHT KIPO 2012위 발명은 어항의 환경에 알맞은 색을 주입한 튜브에 인공 수초 혹은 실제 수초를 재배시킨 튜브에 대한 것이다.