PROBLEM TO BE SOLVED: To provide a small-sized and inexpensive apparatus for removing dirt in a water tank, easy to make operations for its installment and maintenance.SOLUTION: The apparatus for removing dirt in a water tank has the following construction and mechanism: a long-and-narrow-tubeform vessel with its one end left open as an opened end and the other end closed as a closed end is provided with a drain port in the proximity of the closed end, and sunk into rearing water to a predetermined position from the opened end side to project the upper portion of the vessel including the closed end and the drain port above the water surface, thus forming a space partitioned by the water surface and the inner wall surface of the upper portion of the vessel. For supplying bubbles floating toward the space, a foamed material is placed in the proximity to the closed end.COPYRIGHT: (C)2008,JPO&INPIT【課題】 設置作業及びメンテナンス作業が容易で、小型で安価な水槽用汚物除去装置を提供することを課題とする。【解決手段】 長手方向の一端が開放端部として開放され、他端が閉塞端部として閉塞された細長管の容器の上記閉塞端部近傍に排出口を設け、この容器を開放端部側から所定の位置まで飼育水中に沈下させて、上記閉塞端部及び排出口を含む容器上部を水面上に突出させることにより、この容器上部の内壁面及び水面によって仕切れられた空間を形成し、この空間に向かって浮上する気泡を供給するために、上記閉塞端近傍に発泡材を設置する水槽用汚物除去装置を提供する。【選択図】図3
