changing water. It may be that the water quality fluctuates greatly, or that the temperature difference between the new water and the old water is too large, which causes the fish discomfort, or that the violent change of water makes them frightened. If the water quality fluctuates, it is necessary to control the amount and cycle of water exchange and not to change too frequently. If the temperature difference is too large, the new water should be prepared according to the old water to ensure that the temperature is consistent. If it is due to violent water change, it is necessary to rest and treat.

Two, how to change water not dead fish

1, trapped water ahead of time: want to change water not dead fish, first of all, trapped water ahead of time. Because most of the water used in fish farming is tap water, in order to remove chlorine, it is necessary to put it in the sun for a few days. Generally, it takes one day to dry in summer, two days in spring and autumn, and more than three days in winter.

2. Inject water slowly: The process of changing water must be stable. Violent water change is the most likely to cause the death of fish. First, prepare the water pump, slowly pump out the old water in the jar, and then inject the trapped new water into the jar. It should be noted that do not pour directly, but slowly from the wall of the cylinder.

3. Control the water temperature: If the temperature changes in the process of changing the water, the fish will be easily affected and die. In order to avoid this situation, it is better to measure the water temperature before changing the water to ensure that the temperature of the old water is close to that of the new water, so that it is safer to change the water.