How to control the water quality of fishing ponds? (How to adjust the pH of fish pond)

Fish pond water quality control technology is based on pond ecology, through the annual and seasonal changes in fish pond water quality, and the specific changes in water quality during the fish breeding process. Comprehensive manual control is carried out under observation. The water temperature is low every winter and early spring, and the pool water is relatively static. The water quality is clear or the water with a certain degree of fertility (a certain amount of plankton) left over from summer and autumn is used for fish to survive the winter. The water quality control method at this time is to clear the pond, disinfect it, and apply base fertilizer to lay a good water quality foundation for fish breeding in the following year.

From spring to early summer (March to June), the water temperature continues to rise; from autumn to early winter (September to November), the water temperature continues to drop. In these two seasons and their alternation, the water temperature fluctuates back and forth between 15°C and 25°C or slightly higher. At the same time, the temperature difference between day and night is large, the upper and lower convection exchanges of the water body are good, and the water quality is changing benignly. Depending on the main fish species, proper top dressing and feeding can help form good water color and quality. Therefore, these two alternating seasons are the seasons when fish grow the fastest and fastest in the year. They are also the seasons when fish diseases and harmful organisms are easy to grow and spread. Therefore, during these two periods, especially the crossover stage, new water should be injected frequently, and symptomatic drugs should be used to prevent fish diseases. Among them, regulating water quality is particularly important.

In summer, from July to August, the water temperature is high, often fluctuating around 30°C, and the temperature difference between day and night is small. The upper and lower convection exchanges of the water body are poor. In severe cases, it may even be in a stagnant state. The stratification phenomenon with other physical, chemical and biological factors is obvious, and the ecological conditions of the pond are very poor. In addition, through the rapid growth of fish in spring, the amount of fish in the pond increases, and the nutrient salts in the pond are reduced or even lacking, especially phosphorus deficiency is serious. Therefore, it is easy to cause poor water quality and color during this period. Once the weather suddenly changes (low air pressure, sultry days, thunderstorms), the stillness of the pond water will be broken, the water body will exchange violently between the upper and lower parts, and the water quality will extremely deteriorate. It is easy for fish to float, serious to float, and even the pond to flood, causing devastating losses. Therefore, water quality must be artificially controlled during high temperature seasons. First, stop using organic fertilizers when fertilizing is needed and apply chemical fertilizers wisely; second, frequently inject new water and stimulate the upper and lower water layers; third, use an aerator to stir the water layer. In particular, oxygenation of the pond should be carried out before and after drastic changes in weather to prevent fish from seriously floating and flooding the pond.