Detailed Explanation of the Causes of Fish Floating Head and Pond Turnover and the Prevention and Control Methods

In summer, high temperatures and frequent rain easily cause fish to develop floating head or pond turnover. This phenomenon can, at best, affect the growth and development of fish, and at worst, cause mass fish deaths, harming the economic interests of farmers. Therefore, ordinary preventive measures are especially important. So what are the causes of floating head and pond turnover? And how should they be prevented and solved? Let's take a look at the detailed introduction from Qinnongwang.

1. Causes of floating head and pond turnover

In summer there are many causes of floating head, such as convection caused by temperature differences between water layers. In summer, when temperatures are high and daytime temperatures are high, some farmers, in order to reduce the effect of high temperatures on the fish's nutrition, will deepen the water level. This causes the upper layer to have a high temperature while the lower layer is slightly cooler. In the evening, the upper water layer's temperature drops sharply, causing convection between water layers, which leads to a rapid drop in dissolved oxygen throughout the pond and causes penned fish to develop floating head. Photosynthesis is not strong. In summer, high temperatures and frequent cloudy and rainy weather lead to poor light conditions, and the photosynthesis of phytoplankton on the water surface weakens while still consuming dissolved oxygen in the water body, resulting in insufficient oxygen supply and floating head. There are many causes of fish floating head, but they cannot be separated from the cause of low dissolved oxygen in the water body; the other causes are all causes that lead to low dissolved oxygen in the water body.

2. Preventive measures

In summer, with high temperatures and frequent rain, in order to prevent low dissolved oxygen, turn on the aerator at noon on sunny days to send the upper layer of water to the lower layer and repay the oxygen debt. Do daily inspections well and strengthen water quality management. Once the water body is found to be too fertile, add water in time to improve water quality. When preventing, also control the feeding amount. After fish are full, the body's metabolism speeds up, consuming a large amount of oxygen, and floating head easily occurs. In addition, once the bait is fed, it should be fed in the evening; do not leave the bait overnight, to prevent night feeding. If bad weather occurs, stop feeding in time, fish out the fed bait, increase oxygen in time, and inject water.

3. Solutions

Once floating head occurs, turn on the aerator in time for oxygen supplementation. However, if the farming area is large and the number of aerators is insufficient, according to the severity of the floating head, give priority to oxygen supplementation in the seriously affected areas. The change in the severity of floating head has a certain relationship with water temperature. Generally, when the water temperature is low, this change process is long, while when the temperature is high, it is short. Generally, when floating head occurs at a water temperature of 22-26 degrees, it can be delayed for several hours, while when the water temperature exceeds 26 degrees, oxygen supplementation must be carried out within one hour, otherwise the fish will die within a short time. If severe floating head or pond turnover occurs, chemical oxygen supplementation methods can be used to rapidly dissolve oxygen. The specific method is to splash sodium carbonate and zeolite powder on the water surface, generally at 40-45 kg per mu, which can calm the floating head phenomenon within half an hour and generally can be maintained for 4-6 hours.

The above are the causes of fish floating head and pond turnover and the prevention and control methods brought to you by Qinnongwang. We hope it can help you. To learn more, please stay tuned to Qinnongwang.