| 摘要 |
An aquarium or fish tank as disclosed. The tank includes a mesh shelf spaced above the bottom and a port through a side of the tank below the shelf. A tube extends through the port with a downwardly opening nozzle at the end thereof. A valve is disposed at an opposite end and a drain hole. The drain hole is adapted to be attached to a source of vacuum so that debris on the bottom of the tank will be sucked through the nozzle and exit the tube at the drain hole. A valve is disposed at the drain hole to control opening and closing thereof. A resilient seal is provided where the tube extends through the port so that the nozzle end of the tube can be moved both laterally across the bottom and longitudinally toward and away from the port.
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