Ok I dug my pond over 8 years ago and pumped it out and redug it during the drought it shape is like the hookum horns if you google map 14420 forest circle east montgomery tx you will see the shape better. You can see the end of one finger the other finger goes back in the woods another 200 feet that is a natural ditch about 30 feet wide and about 15 feet deep. I left this natural for fish habbitate. The banks are very steep wal out 3 feet and its over your head. The whole lake that you can see has a flat bottom and atleast 20 feet deep. I shot the bottom with a laser and it is pretty flat. Now I read good fish water in in the first 6 feet well I have about 18 feet of water below that that is not mixing. I know it isn't because we swim in it and it is warm on surface and 10 or so feet down it is freezing. Thats my concern about mixing my water. I am not sure what pump I need yet.