This creation is a kind of related cultivation fish tank water circulating purifying device of what,It is mainly what fish jar be equipped with connecting line be connected to lautertuns,It is filtered with enabling the water in fish jar flow into lautertuns,And what lautertuns end is connected with hydraulic pipeline and is connected to fish jar,Water water conservancy diversion to be entered in fish jar,The what lautertuns end is connected with water unit for slowly exporting the water for filtering Hou,The corresponding fish jar is provided with make-up water controller,When the low what setting height of the make-up water controller system what fish jar water level,It can be by carrying out moisturizing movement to the fish jar for water end (W.E.)； Thereby,In a manner of can be by old water be exported and supplements new water,The pH value in water is adjusted,Prevent the water in fish jar have under long-time closed circulation meta-acid,The situation for reducing its pH value generates,And allow the growth that the Shui nationality pet in fish jar can be more healthy,It is avoided that simultaneously and the fish jar is carried out largely to change hydrodynamic(al) work,The opposite water quality that can be prevented in fish jar generates acute variation,The probability of the Shui nationality death of pet in fish jar can be reduced.本創作係有關於一種養殖魚缸水循環淨化裝置，其主要係於魚缸設有連接管路連接至過濾槽，以令魚缸中的水流入過濾槽中進行過濾，且於過濾槽末端連接有輸水管路連接至魚缸，以將水導流入魚缸中，於該過濾槽末端連接設有出水單元供將過濾後的水緩慢導出，對應該魚缸設置有補水控制器，該補水控制器係於魚缸水位低於設定高度時，能由供水端對該魚缸進行補水動作；藉此，以能藉由將舊水導出並補充新水的方式，調節水中的的ｐＨ值，防止魚缸中的水在長時間封閉循環下有偏酸、降低其ｐＨ值之情況產生，而讓魚缸中的水族寵物能更為健康的成長，同時能避免對該魚缸進行大量換水動作，相對即能防止魚缸中的水質產生劇烈變化，可降低魚缸中之水族寵物死亡的機率。
