| 摘要 |
PURPOSE: Provided is an aquarium with water unchanged which includes a medium in the air to clean an upper medium in cleaning without changing water so that it relives inconvenience to change water in the aquarium. CONSTITUTION: In the aquarium with water unchanged which consists of the aquarium(4), a pump(3), a medium(2) and a nozzle piping(1), the aquarium with water unchanged is characterized by using the pump to circulate water of the aquarium, transferring through the nozzle piping, spraying through a nozzle(1-1) to ride on the medium for supplying air and adsorbing or decomposing by microbes to circulate into the aquarium again.
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