I agree that my UV probably kills any pod larvae returning to the tank so if that is a concern, you would want to plumb it another way.
Growing pods is not my main objective, reducing waterborne parasites is.
All of my fish eat prepared foods so I know they are getting the nutrition they need.
However, even with the UV in place, at night I see many, many pods in both the refugium and the main display.
Plumbing a uv before the sump should work fine...