What you see in the photo is Version 3.0 of the pond. Version 1.0 leaked. Version 1.1 was too loud. Version 2.0 was pretty good, but one corner didn't experience much movement due to the placement of the pump and algae tended to grow. Version 3.0 addressed that issue, and, while we were at it, we had the pond enlarged and deepened.
In hindsight, going with a plastic pre-formed pond would have been a lot less expensive and made caring for the pond less work.
Among the trivia I've picked up while caring for ours, covering the bottom of the pond with pea gravel works better than cobblestones. Algae really likes growing on cobblestones. And grindstone, while pretty, does not survive thaw-freeze cycles well. It cracks. Badly.