I know opinions vary when it comes to a UV. But most people do seem to agree that a UV can be effective at preventing the passing of Ich/parasites to a group of tanks sharing a common sump if put on the return line. For the sake of argument, we're just going to assume that the flow is adjusted correctly and the bulbs are changed regularly on this setup. So, given those assumptions, will a UV also kill Flukes, bacterial diseases, etc. as well?