In shrimp and fish farming, weather conditions have a significant impact on water quality and the health of aquatic animals. During periods of heavy rain, prolonged heat, or erratic weather changes (such as seasonal transitions), shrimp and fish are more prone to stress, loss of appetite, poor digestion, and weakened immunity. This makes them more susceptible to diseases and increases mortality rates. Therefore, farmers need to adjust the nutrition regimen appropriately and strengthen the health of their stock to help them overcome these challenging conditions.
- How Do Weather Changes Affect Shrimp and Fish?
When weather changes suddenly, the pond environment also fluctuates, leading to several negative impacts:
- pH, alkalinity, and dissolved oxygen levels in the water decrease — especially after heavy rains or prolonged cloudy conditions.
- Shrimp and fish become stressed due to environmental shock, often seen surfacing, losing appetite, or refusing to eat.
- The digestive system is affected, leading to poor digestion and increased risk of intestinal disorders.
- Immunity weakens, making shrimp and fish more susceptible to diseases such as white feces, hepatopancreatic diseases (in shrimp), gill fungus, gut bacteria, and parasites (in fish).
- Feed efficiency declines, resulting in higher FCR (Feed Conversion Ratio) and increased farming costs.
If not addressed promptly, these conditions can lead to mass mortality, causing significant losses for farmers.
2. How Should the Nutrition Regimen Be Adjusted?
When shrimp and fish are weak or have poor digestion, supplementing their diet with nutrients and supportive additives becomes essential. Specifically:
- Reduce feed quantity during rainy days or when shrimp and fish lose appetite:
When water temperature drops to around 25–26°C, feeding should be reduced by at least 50% compared to normal.
Stop feeding completely if the temperature falls below 24°C.
During this period, shrimp and fish naturally eat less — overfeeding will only lead to water pollution and deteriorate pond conditions. - Supplement each meal with digestive enzymes and vitamins to improve health and reduce stress in shrimp and fish.
Additionally, add minerals directly to the water to benefit both shrimp/fish and the microbial community. This helps:- Shrimp harden their shells faster after molting,
- Fish become stronger and regain balance in their environment.
The product duo from Truong Hai Tien Company provides essential amino acids, vitamins, and minerals that help stimulate feeding, boost immunity, and promote faster shell hardening in shrimp after molting.
In addition, farmers can also use herbal products or liver and gut detoxifiers to help shrimp and fish eliminate toxins more effectively and reduce the risk of disease outbreaks.
The product contains herbal ingredients that help enhance liver function in shrimp and fish.
3. Strengthen Health Monitoring and Proactive Disease Prevention
In addition to nutritional supplementation, farmers should also pay close attention to the following:
- Observe shrimp and fish daily: Monitor feces, feeding behavior, gill color (in fish), and liver color (in shrimp). If any abnormalities are detected, take immediate action.
- Regularly test water quality parameters: Keep track of pH, dissolved oxygen (DO), alkalinity, temperature—especially after heavy rains or extreme heat.
- Maintain dissolved oxygen levels above 4 ppm, with 5 ppm being ideal to stimulate strong feeding activity, fast growth, and better disease resistance.
- Operate paddlewheels consistently, especially during rainy weather, to reduce water stratification and evenly distribute shrimp/fish.
Increase both the number of hours and the number of aerators used daily.
If possible, install a bottom aeration system to promote beneficial bacterial activity and suppress harmful bacteria. - Apply lime after rain to stabilize pH, alkalinity, and water hardness in the pond.
- Eliminate harmful algae to prevent shrimp from being poisoned or developing white feces syndrome.
After algae removal, apply probiotics to clean the pond bottom and improve water quality.
The RHODO X microbial product is a synergistic blend of Rhodopseudomonas palustris and Bacillus spp., offering powerful degradation of organic waste, dead algae, and accumulated bottom sludge. When used in combination with MICROBATE L Protease enzyme from Truong Hai Tien Company, it not only ensures effective water treatment during the rainy season but also provides sustainable algae control, reduces toxic gases, protects the pond ecosystem, and creates favorable conditions for the stable growth of shrimp and fish.
Conclusion
When weather changes, shrimp and fish can weaken rapidly if not properly cared for. Adjusting nutrition appropriately and strengthening their immunity are the “keys” to helping farmers successfully protect their stock under adverse conditions.
👉 The products from Truong Hai Tien Company have been extensively researched and widely applied in many farming models, giving farmers greater confidence in managing aquatic animals during rainy seasons, storms, heat waves, or seasonal transitions. For more detailed information, please contact our hotline: 091616.8200.
