| 摘要 |
Hitherto, when viewing from above, it has been impossible to view aquarium fish clearly due to disturbances on the water surface. Provided is an improvement method, including a manufacturing method, that makes it possible to view aquarium fish clearly from above. Adopting a structure in which overflowing water flows into an upper gutter makes it possible to view aquarium fish clearly from above for long periods of time. |
