You need to ensure your choice of location has not been contaminated with pesticides or fertilizers. These chemicals can cause algae to grow in the pond, which eventually kill the fish that live there.
You must also choose a plot that is not near trees, because leaves and pollen fall into the pond and create hazards for your fish, changing the color and create unhealthy water conditions.
If there is direct sunlight on the natural pond, then it will help your natural plants and fish to thrive and purify the water. Some fish, like Koi fish, like dark spaces, so that they can hide away from predators, but if you include water lilies on the surface, then they will create some hiding places and dark spaces for your fish.
To read more Fish Living In Your Natural Ponds
