Fish Health & Densities

Aeration • Algae Control • Biological Control • Chemical Control• Dissolved Oxygen • Fish Health • Oxygen Depletion • pH Levels • Temperature/Shading • Pond Home

The health and density of a fish population is very sensitive to what is occurring in their aquatic environment. In order for these pond inhabitants to survive, the pond must maintain a good ecological balance. This includes, but is not exclusive to, aquatic vegetation, oxygen levels, temperature, and biomass. All factors are intertwined and can affect one another. For example, too much algae is definitely not a good thing, and an overabundance of this aquatic vegetation can lead to mass fish kills. This is the result of inadequate oxygen levels.

The overall temperature of the pond will affect the entire aquatic environment. During warm weather, the sunlight penetrates the shallow waters, allowing photosynthesis. As the number of plants living in the pond increase, more oxygen is consumed for their survival. This leaves little to no oxygen for the fish, which become stressed from lack of oxygenation and could perish.

As increasing numbers of algae begin to cover the pond, a more protective habitat for the fish is formed, making it hard for predators to feed. This allows the overall fish population to increase unchecked. As the number of fish rise, so does the accumulation of feces and uneaten food. To rid itself of the unwanted gunk, the pond will go through decomposition mode. This requires vast amounts of oxygen. Once again, the lack of oxygen could lead to a fish kill.

During cooler weather, the fish are more directly affected. While warm water increases fish consumption of oxygen by accelerating metabolic rate, cool weather regulates their activity. In addition, any sudden change of the weather can lead to water turnover , which can disrupt the fish by shifting the oxygenated water.