The "bag disinfection" method for fingerlings is a modern and practical technique that has been developed and widely adopted by fish farmers in recent years. This approach is simple, cost-effective, and helps reduce fish diseases while ensuring a high survival rate. The process involves the following steps: surgical gown,non steril isolation gown,sms gown,white gown,blue gown Shandong Zhushi Pharmaceutical Group Co.,LTD , http://www.sdzs-medical.com
1. **Preparation of the Operation Area**: Place the nylon bag containing the fingerlings at the edge of the pond, making sure the bag mouth is open. Ensure the water level inside the bag is even. Gently pour the disinfectant solution into the bag and observe the fish’s behavior. After the recommended disinfection time, carefully transfer the fish back into the pond.
2. **Disinfectant Solutions and Soaking Times**:
- A 5% to 13% salt solution can be used for 20 minutes to prevent bacterial infections.
- A copper sulfate solution at 10–15 mg/L should be used for 15–20 minutes to control trichodina, filamentous bacteria, and anchor worm disease.
- A 10 mg/L bleach solution can be applied for 20 minutes to prevent bacterial skin diseases and rickets.
- A 20 mg/L potassium permanganate solution is effective for 20 minutes to combat various parasites and fungal infections.
- A mixture of 8 mg/L copper sulfate and 10 mg/L bleaching powder for 20 minutes helps prevent gill disease, red skin disease, and enteritis.
- A combination of 5 mg/L bleaching powder and 3 mg/L caustic soda for 20 minutes is useful against parasitic insects and ringworm.
- A 0.2 mg/L fish-worm spirit solution for 15–20 minutes can help prevent gill diseases, anchor worms, and other external parasites.
3. **Important Precautions**:
- Always dilute the disinfectants according to the manufacturer's instructions before adding them to the bag. Never pour concentrated solutions directly into the bag or use metal containers for mixing.
- The recommended soaking times are based on an average water temperature of around 20°C. Adjustments may be needed if the water is significantly warmer or cooler.
This method not only ensures the health of the fingerlings but also helps maintain a clean and disease-free environment in the pond, making it a valuable practice for sustainable aquaculture.