Summer temperatures are high, rainfall is high, and weather changes quickly. Summer is also the peak season for fish growth in a year. Due to the high water temperature, fish pathogens also multiply. Since most of the high-density intensive culture methods are now implemented, the pond water body is more loaded and the water quality is more fat. If there are hot days and thunderstorms, especially when it is sunny or rainy or it turns sunny, the fish usually go from midnight to dawn. Floating heads, when severe, can cause flooding, resulting in the death of a large number of farmed fish. The main reason for pan-pools is abrupt climate change, reduced air pressure, and reduced dissolved oxygen in water. In the case of long-term floating heads in farmed fish, fish exhibit longer lower lip than upper lip, less appetite, and lower feed utilization factor. As a result, the fish's resistance to disease will be weakened, and fish disease will also occur in large numbers. 1, pay attention to regulate water quality. Water is a living environment for fish. To maintain good fish, you must first manage the water. The color of the pond is green in the morning and the best in the afternoon is yellow green. Control measures include: (1) Change the water or add new water at the appropriate time, and the amount of water is 1/4 - 1/5. (2) Each month, the stability of chlorine dioxide Quanchiposa Zhouzhou brand spilled 2 times, with an average depth of 1 meter per acre with 70 grams. It can significantly increase the alkalinity and hardness of pool water, improve the carbon dioxide balance capacity of pool water, and prevent fish diseases. (3) Appropriate amount of fertilization, generally based on the water color to determine the requirements of less, more times. Fertilize on sunny day. (4) Control the occurrence of large-scale zooplankton. If the pool water is lean, the fish often floats and when the naked eye can see the zooplankton, the average water depth of 1 meter per acre can be used with a 20 ml Quanchiposa to prevent the occurrence of insect pests, or to increase the stocking amount of the earthworm. (5) Conditional oxygen generators can be used to increase the amount of dissolved oxygen in the water and improve water quality. 2, Strictly do a good job of "four set", namely: timing, quantitative, qualitative, positioning. Normally, more feed is used in sunny days, and less feed is used in rainy days. The total amount of feed is 3% to 5% of the total amount of fish. At the same time, the quality of feed is ensured, and overfeeding of feed is avoided, causing both feed wastage and water quality. 3, fish disease prevention. Fish live in water. Once it is sick, it will be difficult to diagnose and treat it in time. In particular, sick fish after the onset have no appetite. Even if a specific drug is used, it will be difficult for fish to enter the fish because they do not eat. Therefore, it must be Great emphasis is placed on preventing fish diseases. The fry was completely cleared with 100 kg of lime per acre in front of the fish pond to eliminate the pathogens. After the lime was disinfected, the seedlings were generally released after 7 days. During the rearing process, the average average depth of 1 meter is every 15 days, and about 70 grams of stabilized chlorine dioxide is sprinkling once. This will have a good preventive effect against various infectious diseases caused by viruses and bacteria.
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