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Pond Dynamics and Balance

Learn about the key factors that affect water quality in a pond, including dissolved oxygen, alkalinity, hardness, and pH. Discover how these factors can be manipulated to maintain a healthy pond ecosystem and promote the growth of algae and fish food.

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Pond Dynamics and Balance

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  1. Pond Dynamics and Balance

  2. Water Quality Factors 1. Dissolved oxygen 2. Alkalinity 3. Hardness 4. pH

  3. Dissolved Oxygen 1. Action of wind, waves (surface) 2. Photosynthesis from aquatic plants 3. Aerators

  4. Dissolved Oxygen 1. Colder water holds more dissolved oxygen 2. Different species of fish have different D.O. requirements. 3. Dissolved oxygen changes throughout the day and night Dissolved Oxygen Sunrise Sunset Sunrise Time of Day

  5. Alkalinity, hardness, and pH 1. These factors depend on conditions of surrounding watershed 2. Should have pH that’s between 6.5 and 9 3. Should have an alkalinity and hardness of at least 20 ppm These factors can be changed by liming the pond. They promote the growth of algae and other fish foods.

  6. Pond Food Chain Algae and phytoplankton Nutrients (fertilizer) Small fish eat algae Man harvests fish Big fish eat small fish

  7. Pond Balance Based on maintaining food chain Nutrients, water quality factors Prey fish Predator fish Regular fish harvest

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