How do you prevent disease when farming eels? There is real know-how involved

Every year in July, August and September, the weather is hot, and farmed eels are prone to serious diseases.

The main signs are: 1. Gill rot disease caused by parasites or bacteria. 2. Liver-kidney syndrome caused by feed or management factors. These two diseases have a high mortality rate and are difficult to treat, and they are the biggest headache for many farmers. Based on follow-up surveys in recent years, I would like to offer some humble observations on this issue.

1. Focus on prevention to avoid disease outbreaks

The specific steps are as follows: 1. Regularly use insecticides, mainly insecticides for preventing parasites such as Dactylogyrus and Trichodina. 2. Use them together with conventional disinfectants such as potassium permanganate, bleaching powder and chlorine dioxide.

2. Strengthen water quality management, run more aerators and cultivate more green algae

The water depth is best kept at 1.5-1.7 m. This depth, together with the heat-insulating effect of green algae, helps keep the pond water stable, but at the same time you must run more aerators to ensure the pond water has enough dissolved oxygen. Otherwise, green algae will die off in large numbers and harmful algae will multiply massively and become the dominant population, which will make the pond water transparency very low and make water quality management much harder.

3. Controlling feeding is very important

For old eels, during this period you can switch to feeding once a day, preferably before 9 a.m.; for new eels, while strictly controlling the feeding amount, you should add more vitamin C to the feed to improve the eels' immunity.

4. Choose high-quality feed

Farmers mostly use processed feed. During this period, the processed feed should reduce the use of red fishmeal. If it must be used, it is best to choose high-quality red fishmeal with good freshness and low histamine content to ensure feed quality.