Summer is a critical season for fish farming. With rising temperatures and active fish metabolism, proper pond management becomes essential to ensure healthy growth, reduce fish mortality, and increase overall yield. In this guide, we’ll cover the most important summer pond fish farming management measures, focusing on water quality, oxygenation, feeding, harvesting, and disease prevention.
1. Water Quality Management
Water is the foundation of fish health. Poor water quality leads to disease outbreaks and slow growth. Follow these best practices for summer water quality control:
1.1 Add Fresh Water Regularly
Fish grow rapidly in summer and require fresh water every 7–10 days. Add 20–30 cm of water each time, maintaining a pond depth of around 2 meters. The ideal water transparency is around 30 cm.
1.2 Control Fertilizer Use
Organic fertilizers should be reduced or stopped in summer. Use chemical fertilizers in small, frequent doses to support plankton growth. Monitor water color:
- Light brown or soy sauce color with >40 cm transparency: Increase fertilizer.
- Dark water, <25 cm transparency, bad odor, or fish gasping: Stop fertilizing and add water immediately.
1.3 Operate Aerators Smartly
Proper use of aerators prevents hypoxia (low oxygen levels):
- Sunny days: Run aerators at noon.
- Cloudy days: Operate early morning.
- Continuous rain/fish density high: Run at midnight.
- Emergency: If fish are gasping, start the aerator immediately.
1.4 Disinfect and Purify Water
Apply lime at 15–25 kg/mu (per meter depth). Dissolve and filter before use. For plankton blooms, apply 0.3–0.5 g/m³ of dichlorvos. For blue-green algae, use copper sulfate at 0.7 g/m³.
1.5 Inspect Daily
Use the “Three Checks” method:
- Check the weather.
- Observe water color.
- Monitor fish feeding behavior.
Adjust water management based on observations.
2. Timely Harvesting and Stocking
High-density, mixed-size stocking requires timely removal of market-size fish to free space for younger ones. Follow these harvesting tips:
2.1 Stop Feeding Before Harvest
Cease feeding one day before harvest to reduce oxygen consumption and improve survival during transport.
2.2 Drain Water Before Netting
Lower the water level by half to facilitate net fishing.
2.3 Choose the Right Time
Harvest during high oxygen periods. Best times: early morning or cool, sunny nights. Avoid netting if fish show signs of oxygen stress.
2.4 Prevent Thermal Shock
Avoid large temperature differences between pond and transport tank (no more than 5°C). Gradually adjust temperature when cooling with well water.
2.5 Refresh Water After Harvest
Run aerators and add water to help fish recover by cleaning mucus and increasing dissolved oxygen.
2.6 Disinfect Entire Pond
Apply disinfectants such as bleaching powder at 1 g/m³ post-harvest. Filter before use and apply evenly.
3. Five-Principle Feeding Strategy (“Five Fixed”)
Scientific feeding maximizes growth and feed conversion. Apply these five principles:
3.1 Fixed Feed Quality
Use fresh, nutritious feed. Avoid frequent brand switching to maintain stable appetite.
3.2 Fixed Feed Quantity
Adjust daily feed based on fish size and water temperature. Do not overfeed. Stop feeding during adverse conditions or oxygen shortage.
3.3 Fixed Feeding Time
Feed at consistent times—usually 3–6 feedings between 8 AM to 6 PM. Maintain a stable schedule.
3.4 Fixed Feeding Location
Install feed platforms in quiet, sunny locations for consistent feeding.
3.5 Fixed Feeding Personnel
Assign dedicated staff or use automatic feeders. Regularly calibrate feeder output for accuracy.
4. Disease Prevention and Control
Summer is the peak season for fish diseases. Common summer fish diseases include:
- Bacterial: hemorrhagic septicemia, gill rot, enteritis
- Parasitic: anchor worm, gill lice, tapeworm, ich, dactylogyrus
- Environmental: oxygen depletion or “fish kill”
Disease Prevention Measures:
- Disinfect every 15 days with appropriate chemicals.
- Monitor fish behavior: abnormal swimming, loss of appetite, gasping.
- Treat immediately when symptoms appear.
Conclusion
Proper summer pond management ensures strong fish growth, high survival rates, and maximum profits. Whether you’re using paddle wheel aerators, impeller aerators, or solar aerators, each tool plays a key role in maintaining a healthy pond ecosystem. By focusing on water quality, oxygenation, feeding, and disease control, fish farmers can thrive even in the heat of summer.
