An ultraviolet sterilization device for aquariums, comprising a water pump, a filter, an ultraviolet UV sterilization lamp, and a ring-shaped filter cotton. The water pump can pump water, the filtering system is arranged under the water pump, and the ultraviolet UV sterilization lamp It is installed in the filter body, the ring-shaped filter cotton sleeve is added to the periphery of the upper water inlet ring, and through the water inlet opened between the bottom of the water pump and the top of the filter body, and the water outlet opened below the filter body The design that can generate a large flow rate to speed up the water circulation. With the structural feature of the filter body with a polygonal or flat reflector, when used in combination, the large water absorption function of the special submersible motor is used to make the fish tank The water is sucked into the filter body through the water inlet, and the ultraviolet UV lamp has the function of fast algae removal. Combined with the filter body with a polygonal or flat reflector, it can quickly and effectively remove algae and sterilize it. The water outlet flows out, and has the effect of rapid water flow repeatedly passing through, which will increase the function of ultraviolet UV germicidal lamp for sterilization.一種水族用紫外線殺菌裝置，包括有水泵、過濾體、紫外線UV殺菌燈，與有環圈形過濾棉所組成，該水泵係可抽取水，該過濾體係設於該水泵下方，該紫外線UV殺菌燈係架設於過濾體內，該環圈形過濾棉套加在上面進水口環周緣外圍，並藉由該水泵下方與該過濾體上方之間開有之進水口，以及該過濾體下方開有之出水口的設計，而可產生流量大以加快水循環的設計，搭配該過濾體設有多角型或平面型反光片的結構特徵，俾於結合後使用時，利用特殊型沈水馬達的大量吸水功能，將魚缸的水吸入經進水口流入該過濾體內部，以紫外線UV燈具除藻速度快功效顯著的功能，結合過濾體設有多角型或平面型反光片加以快速有效的除藻殺菌過濾後再由該出水口流出，而具有快速水流反覆通過後的效果，將因此而增加紫外線UV殺菌燈進行殺菌相應而提升之功能。
