That's sound quiet expensive to make. And the pond there is lovely...but lilies and grasses should take time to grow I guess.Beside what Deadliestviper7 said, a large pond about the size of a city block, nice warm temps in summer, lots of direct sun, and tons of fish, and chicken carcasses, lots of hot dogs.
Be prepared to shovel a lot of ****.
There's one in almost every pond of that size I've seen from Sarasota Fl on south.