Description: The UV clarifies the water by reducing the number of free swimming algae, bacteria, virus,fungi and protozoans. Offer a healthy environment to fish. When water under ultraviolet irrdiation of wavelength in 253.7 nm's, the germ and pathogen in water will be killed then. CUV-503/505/510 can be used both for submersible or outside the water. This UV clarifying can be fixed with HQJ-500G/700G/900G/1200G and JP 022~02S pump.