To reduce the pH value of the fish pond, you need to add a proper amount of talcum powder to the water to adjust, usually 1-2 kg per mu. Alum can also be poured into the fish pond, 0.5-1 kg per mu can be used, must be sprinkled throughout the pond. If you change the water at ordinary times, don't use the river water which is too alkaline. In addition, applying organic fertilizer to water can also improve the situation of excessive alkalinity of water body.
1. Decreased dissolved oxygen: If the pH of a fish pond is on the high side, it will lead to a large number of algae breeding. Although it can carry out photosynthesis and release oxygen during the day, it will consume oxygen at night, which will cause hypoxia in fish, and even cause liver and intestinal problems.
2. Damaged fish gills: a relatively high pH indicates that the water body is alkaline. For many fish, alkaline water is not suitable for survival, and may even cause alkalosis, causing corrosion of fish gills and other parts, and pathological changes in tissues. In serious cases, it may also cause a large number of fish deaths.
3. Fish poisoning: After the residual bait and fish in the water are decomposed by microorganisms, certain ammonia nitrogen will be produced, which is toxic to the fish itself. But if the pH is too high, it will also convert ammonia nitrogen into molecular ammonia, which is more toxic, so it will poison and kill fish.
