The JUP-01 UV filter have been designed to be fully submersible in fresh and salt water It is easy to install and maintain. The water pump enclosed supply the water to pass through the UV light cavity whereby the radiation of the UV light works to clarify the water The UV filter easily clarify the water by reducing numbers of free swimming algae, bacteria, virus, fungi and the smaller life stages of protozoans It can be placed anywhere in the aquarium and the pond