Cinnamon teals and Baikal teals.
I clean the skimmer once or twice a week and I use a pool skimmer about 2 times a week to try to get stuff of the bottom. So far the pond is clean enough. To me I'm getting more dirt off the plants in there then the ducks haha
We had truses put on but in the front we shaved the corner off to make it easier to get through. We took a 4x4 from the middle to the back pole. It was a lot of compound miter cuts.