A kind of aquatic animal cultivating of what excreta filtering circulating device is closed in this creation system,System is equipped with the appearance water unit of a tool water space capacity； One flow guiding unit is arranged in the what appearance water unit,It uses and separates out a collecting tank,The open-work of more than one is opened up on the flow guiding unit； One lautertuns be equipped with the first overflow chamber,Second overflow chamber and third overflow chamber,The flood level elevation of first overflow chamber exceeds what second overflow chamber,It uses and can produce a water-head,First overflow chamber is connected with the collecting tank； One draws water in unit setting what third overflow chamber,The unit that draws water is connected to the water space capacity equipped with an outlet pipe； One guide seat is arranged in the what collecting tank,Guide seat is equipped with a plurality of guiding roads. It is dynamic using the water level official post liquid flow, cleaning excreta can be concentrated rapidly, and can re-cover circulating purification liquid.本創作係關於一種水族養殖用排泄物過濾循環裝置，係設有一具容水空間之容水單元；一導流單元設置於該容水單元內，藉以區隔出一收集槽，該導流單元上開設一個以上之透孔；一過濾槽設有第一溢流室、第二溢流室及第三溢流室，該第一溢流室之溢流水位高度高過於該第二溢流室，藉以可產生一水位差，該第一溢流室與該收集槽相連通；一抽水單元設置於該第三溢流室內，該抽水單元設有一出水管連通至該容水空間；一導引座設置於該收集槽內，導引座上設有複數個導引道。利用該水位差使液體流動，可以迅速集中清理排泄物，並且可以重覆循環淨化液體。
