I would try to get a filter on the pond. Also renaming is fairly easy. Up by the thread name there should be a place that edit or something like that. It should give you the option to rename it.
So glad your girl started to lay! I have heard that moving a nest can end the broodiness so it really is what ever you feel is safer. It would be best, if you decide to move her, that you put her in a place that no other ducks are. They will disturb her and when the babies hatch the other ducks...