Here is my 2000 gallon pond. I installed everything last fall with just enough time to get it up and running, then shut it down for the winter. This spring I fired it up, finally added fish about a month ago, and just recently added aquatic plants.
The pond has a 25' long stream with a biofall box at the head. This has filter matts and bags of lava rock for biological filtration. The skimmer is at the opposite end of the pond and houses a 6000 gph circulation pump.
I built the pond in 8" shelves and have a small area in the middle that reaches a 4th level so, about a 30 inch max depth. So the first shelf around the peremiter of the pond 6-8" is perfect for marginal plants.
So far fish stocking includes 7 various colored koi, and one long finned goldfish. Fish range from 4" to 8"
Aquatic plants includes rushes, water lilies, mini cattails, hyacinth, water lettuce, forget me nots.
I will try and get some pictures of the fish and new plants, but fish hide in the fish caves I made and right now it is raining. Here is a start enjoy!