| 摘要 |
PROBLEM TO BE SOLVED: To provide an aquarium for growing aquatic organisms, without requiring a complex pipe and structure, nor plural pumps, and capable of controlling a water level corresponding to the ebb and flow. SOLUTION: The ebbing and flowing water level can be allowed to appear in the raising aquarium by installing electrically-driven opening and closing valve having two kinds of overflow pipes for ebbing and flowing. That is, the aquarium is characterized by the structure comprising a raising vessel 2 having the electrically driven opening and closing valve 1, and a filtering vessel 3.
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