What is the method called that eliminates all fish from a pond?

The method referred to for eliminating all fish from a pond is known as total drawdown. This technique involves significantly lowering the water level in the pond, often to the point where it becomes too shallow to support fish life. By doing so, both adult fish and their eggs can be effectively removed or killed, thus achieving the goal of complete fish elimination.

Total drawdown can also expose other aquatic organisms to air, leading to the natural die-off of unwanted species. This method is particularly useful in managing fish populations, creating opportunities for habitat restoration, or preparing a pond for new aquatic life.

On the other hand, while partial drawdown might lower the water level to some extent, it does not guarantee that all fish will be removed. Chemical eradication involves the use of chemicals to eliminate fish and can be effective, but it does not physically remove fish from the habitat. Biological control refers to using natural predators or biological agents to manage fish populations, rather than removing them entirely.