Unlike the traditional Blagdon Inpond 5in1 2000, the Affinity model does not come with a UV green water clarifier. In our UK testing centre, we found that both Affinity View pools would run crystal clear with good maintenance and healthy plants. Rather than supply something you didn’t really need why not just leave it out and cut down the price? However, if you do feel you need a UV, you can easily upgrade the unit with a Blagdon 5w UVC. Watch the video to see how easy they are to install!