Sun, depth, dimensions, water movements and temperature, differ between each pond.
The following example will be helpful in achieving a natural balance for your pond.
The recommendation for each square metre of surface area:
One bunch of oxygenating plants – These help in maintaining water clarity, and reducing the proliferation of green algae.
One medium to large water lily – These help to provide surface coverage preventing evaporation and for the fish to hide.
One bog plant or small marginal plant (per two square metres) – These help to consume excess pond nitrogen and phosphates.
Two fish – Gold Fish or Native Rainbows – These control pests such as aphids, flies and mosquito larvae and other insects.
Do not feed fish in the pond – Fish are algae, larvae eaters and by feeding them you are adding more nutrients into your pond that will make algae grow.