Yea, i kinda made a judgment error, well maybe not a error but i went for a very natural look to the pond, so there is no real sharp drop off on the one side, it goes from a swampy sand rock area to a very gradual slope as you would most likely see in a real pond.In the middle it goes to just over 40 inches in depth.
My vision was to use as much local flora and make the pond/waterfall look as natural as possible.My parents stopped feeding the koi about 4 weeks ago so hopefully they dont have any food left in them that will rot when there metabolism slows down for the winter.
I havent been to there house in about a month but i assume the koi are doing well.