We must change the water for fish farming. There are many advantages to injecting new water. It can better maintain the water quality. At the same time, it can also improve the dissolved oxygen in the water body, because the oxygen in the old water will continue to be consumed.If the water is not changed for a long time, the water quality will be aging, even if it looks very clear, it will contain a lot of harmful substances such as ammonia nitrogen, which will lead to fish poisoning, which is harmful to their health.
1. Frequency of water change: It is generally necessary to change the water for the fish once a week. If there is a filter in the fish tank, the water quality can be better maintained. In this way, the cycle of water change can be postponed to once half a month.Water can not be changed too frequently, otherwise it will cause some stimulation to the fish, leading to its stress response.
2. Water volume control: The water volume is different according to the frequency of water change.If the water is changed frequently, don't change too much water each time, not more than one fifth of the total amount.If you don't change a lot of water, you should change a little more each time, but not more than one third at most.
3. Precautions: Be sure to pay attention to the water temperature when changing the water. The temperature of the new water can be 1 ℃ higher than that of the old water, but the difference cannot be too large.At the same time, the water can not be changed by violence, the water can be pumped out from the bottom by a pipe, and the dirt can be brought out at the same time, and then the new water can be poured in from the wall of the tank.
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