Well, with DH's help we got all the other eggs out of the nest. It's been a week since the ducklings hatched. We candled them all, there were 14 that didn't hatch. Some seemed to be infertile and we could see a yolk. Others were dark and scary, we think maybe filled with bacteria. 2 or 3 looked like they might have developed part way then died. We did not crack any open. I'm afraid we weren't brave enough....
I did put a paint tray of water in the enclosure and after about half an hour the ducklings found it. They splashed around then preened and hid under Edna. I took it back out for now but will try to give them swim time each day. I couldn't get any decent pictures. I think Edna thinks my camera strap is a snake or something. She hates the camera!