Honestly I dont care too much about fish. I want to build the pond in the best way I can and if any species of fish can live in it at that point I may stock it with what ever is best. There is a small pond in the area now so I know the ground can be made to hold water at SOME depth. I know when it comes to how deep to dig one if you go too deep you have a problem (dig through the clay) do you have the same problem if you dont go deep enough as well?
