Thanks for the response Cody, appreciate it! Good questions. What do you think is a good depth to go for? There are almost no deciduous trees around, only coniferous, so there should be limited leaves that go into the pond. The pond is also kept full via well, so no silt. So only organic matter from fish, aquatic plants, and the stray leaf. Given this how quickly do you think sediment will build on the bottom? How deep would you go?

At the end of the river you will see that dashed red line. That represents a 3 foot diameter culvert about 6 feet below water level. On the one side of this I will place the air lift pumps. These pumps are what will pull the water through the culvert, and into the other side, completing the loop and adding lots of oxygen along the way. Sorry I should have explained this!

Here is a video of what I want to build, but on a bigger scale: https://www.youtube.com/watch?v=TOVZ4oklBFw

Thank you for taking a look!