AQUATOP's IF-UV Series of Internal Filters with UV are easy to install and maintain. These innovative and flexible filters help to eliminate unsightly algae and control unwanted algae blooms with the integrated UV system. In addition to the UV, each unit is equipped with an easy change replaceable pre-filter sponge and activated carbon for Mechanical and Chemical filteration. The UV bulb assembly includes a power switch allowing it to run indepenently from the filter pump. The IF-UV Series aids in the health of the aquatic life by eradicating harmful free-floating micro-organisms in fresh or saltwater aquariums, and the bottom mounted pump makes it a perfect choice for sump or turtle tank applications.