+ Low dissolved oxygen and environment’s pollution is affected by contamination of dead algae, excess food causes decreased oxygen in the water and high levels of toxic gases, high density , lack of oxygen causes the algae too dark at night and at dawn , using oxygen -consuming chemical as well. .
+ Salinity changes dramatically when moving from hatchery to pond, heavy rains, water changes, and sun heat prolonged.
When shrimp stressed , metabolic disorders lead to mineral loss , decreased nutrient absorption , poor swimmers , fell prey , grow slowly , reducing resistance, disease susceptibility .
How to detect shrimp being stressed: Seeing reduce food, unusual colors such as pink , purple or darker , easily curved body , dense flashed mechanical lift when it is sunny.
How to help overcome the stage of stress in shrimp: reduction initiative of the causes of stress and feeding an effective manner; shrimp pond is to pick disinfectant is highly secure; prolonging hot weather to curb distribution of food to avoid polluting the water and live shrimp susceptible to white feces; fans provide sufficient oxygen in the water to ensure minimum waste 3ppm edge.
Regular use of Vitamin C in the cold season and especially hot shrimp will help boost the immune system. Periodic use of probiotics in the treatment of water and mixed in the food of shrimp.