In autumn, water temperatures typically range from 20 to 30°C, making it an ideal season for fish growth. To maximize your profits during this period, there are four effective methods you can implement:
1. **Fill the Pond Water**: The saying "deep water raises big fish" holds true. Adult fish ponds should maintain a deep water level, while breeding ponds can be filled to 1.5 to 2 meters. This creates a spacious and healthy environment for fish, ensuring sufficient dissolved oxygen, natural food sources, and better overall conditions for growth.
2. **Provide Adequate Forage**: Traditional aquaculture practices emphasize that "grass with three crops" helps support the growth of herbivorous fish like grass carp, as well as filter feeders such as silver carp and bighead carp. It's recommended to feed 20–30 kg of dry grass or 80–100 kg of fresh aquatic plants per 100 kg of grass carp daily. Additionally, always observe the fish, check the water quality, and adjust feeding accordingly. Follow the principle of frequent but small feedings, ensuring fish eat well and grow efficiently.
3. **Implement Scientific Management**: In autumn, it's common to hear "one day is magnanimous," meaning that proper pond management is crucial. Ponds with high water quality should be monitored closely to prevent overflow. During sunny afternoons and in the evening, use an aerator to mix oxygen levels between the upper and lower layers of the water, reducing the risk of nighttime oxygen depletion.
4. **Prevent Fish Diseases**: Daily pond inspections are essential. Watch for changes in fish behavior and feeding habits. Regularly change the water—about 10–15 cm every week—to keep the environment clean. Remove leftover feed and debris promptly, and clean feeding areas regularly. Disinfect the feeding platform every two weeks using bleach. Use copper sulfate or bleach periodically to prevent diseases. If any sick or dead fish are found, remove them immediately for testing and treatment.
By following these four strategies, you can significantly improve fish health, growth rates, and overall profitability during the autumn season.
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