It is main use the functions of the release of solid oxygen ball and the living creature nourishment liquid and the living creature conversion to reach the essential condition of fish living. Solid oxygen ball can release oxygen slowly. At the same time it can absorb the water impurities and change it into microorganism for fish food; The living creature nourishment liquid can moderate aquatic and sour alkalinity. There are also several kinds of microorganism in able to increase the alimentation and the corporeity of fish. The advantage of “wonderful water angel are free pump, free treatment, free feeding. In normal condition, it can supply oxygen and nutrients for 3-6 months. When the oxygen ball give out it’s oxygen, you can open the container and put in some new oxygen ball and living creature nourishment liquid in order to supply enough oxygen, so that the fish can live happily.