I am very sorry you lost her. It's a blessing to have a pond but comes with risks as you found out. I hope you can get rid of the ones you have but always be watchful because more will come. Some are able to call fish and wild life and get help removing them might give it a try .I brought her in and put her eggs in the incubator with some others. I gave her a Epsom salt bath in the tub. And coated her leg in Neosporin. Like you said I also bandaged her up and took her to a vet once they open they said her leg was to mangled. That she would never be able to use it. It would always drag.. I still had all hope for her they kept her and she passed away. We have been baiting the turtles my ducklings aren't going to the pond till i know it's safe. This is the first encounter we have had and the first time we have seen a turtle in the pond.
Happy to hear your lil duckling is doing great. It's adorable.