This creation, which ties up in cylinder, sets submerged motor connection undergravel filters, and the outer rim on the left of cylinder bottom can control fish jar water storage or draining if a rotatable L-type pipe. Surrounding sets multiple grades of columns in cylinder,V-type lamina of septum pellucidum is set up thereon,Its bottom has hole top non-porous,Ornamental shrimp and water flea can be raised,And water flea can be prevented floating to the water surface,It is eaten up by fish； The residual bait for feeding small fish bait falls into the lower layer of lamina of septum pellucidum,It is eaten for the shrimp water flea of lower layer,Such bait can make full use of,And prevent residual bait from polluting water quality； When the excrement of fish falls into the lower layer of lamina of septum pellucidum,The nutrient source for lower layer green alga and bacterium is become,Green alga and bacterium are the biological baits of water flea,Nascent water flea is the biological bait of shrimp again,Nascent shrimp and water flea are swum into upper layer,The biological bait of small fish can be become,Form the Food-Chain System of fish jar inside enclosed； Especially this creation bottom blow-down system,As long as rotating the draining of L-type pipe while stirring bed load,Complete clear cylinder working.This creation simultaneously sets external hanging type farrowing box in cylinder outer side edges, so that peacock fish produce small fish, can pass through the water flow size of sector water outlet component adjustment farrowing box.本創作係在缸內設一沉水馬達連結底砂過濾器，在缸底左側外緣，設一可旋轉L型管，可控制魚缸儲水或排水。在缸內四週設多個檔柱，其上架設V型透明隔板，其底部有孔頂部無孔，可飼養觀賞小蝦及水蚤，且可防止水蚤浮至水面，被魚吃光；餵小魚餌料之殘餌落入透明隔板的下層，供下層的小蝦水蚤吃，如此餌料可充分利用，並防止殘餌污染水質；當魚的糞便落入透明隔板的下層，便成為下層綠藻及細菌的營養源，綠藻及細菌是水蚤的生物餌，初生水蚤又是小蝦的生物餌，初生小蝦及水蚤遊入上層，會成為小魚的生物餌，形成魚缸內封閉式的食物鏈系統；尤其本創作底部排污系統，只要撥動底砂的同時旋轉L型管排水即可，完成清缸工作。本創作並在缸外側邊設一外掛式產仔盒，以供孔雀魚類生產小魚，其可透過扇形出水口組件調整產仔盒的水流大小。
