What are the elements in a natural aquatic ecosystem?
The basic elements are water, aquatic plants, fish, rocks & gravel (in the pond), and aerobic bacteria. These items work together to keep nutrients (fish waste, uneaten fish food, leaves/organic debris) in the water at a minimum level. When this is accomplished, the water should remain clear and algae will be kept under control. Removing any of the basic elements will result in an ecosystem that is out of balance. The most common side-affect of an unbalanced ecosystem is green and unsightly water in the pond.
