I think those tubewormy things must like the dark (or less light anyways), I have quite a good population living in my overflow box which is shaded. They haven't migrated into my sump as I use a filter sock (yay another thing my filter sock is good for). Your shiny new sump and all its goodies make me want to clean my sump, but then my sump wasn't even that pretty to start with, I think it must be the sexy red skimmer. Gotta get me one of those
