I considered a koi pond almost three years ago. I was very ambitious. Life happens, so it was put on hold. Later, I down sized it to 2/3 of the original volume. Some other more important things happened, so it got put on hold again. In the mean time, my wife and I landscaped most of our backyard. Recently, we built a pergola and have plan to put a deck underneath. There is space left on either side of the pergola for a small pond and a good size filter pit. Now, this pond is 1/5 the volume of the first planned pond. It's going to be a square, 10' x 10' x 5'. Since the deck will be 1' above grade and we want 2' between deck surface and pond edge, this makes 3' raised walls on the remainder three sides of the pond. I haven't seen any picture of pond wall this high. Anyone has any picture to post? Or point me to a thread with pictures? Is this going to look good? I'm worried that the 3' high walls aren't going to look appealing!