The water for raising fish generally uses tap water. After being disinfected by the waterworks, it does not contain pollutants, so it is cleaner than the water outside. However, there will be residual chlorine residues in the disinfection process, although there is no harm to human body, but it is still very dangerous to fish, so it is necessary to remove residual chlorine by drying water, but also to improve water temperature, which is more suitable for fish farming.
1, drying: the most commonly used method of trapping water is drying. But drying is divided into two situations, one is when there is the sun, that is, drying, drying for 1-2 days, and the other is that there is no sun, or water can not be dried, so it can only be aired, generally for a week, the chlorine in the water can dissipate.
2. Explosive oxygen: In addition to drying to trap water, explosive oxygen can also be used to accelerate the volatilization of chlorine. This requires an oxygen pump, which usually needs to be turned on for 24 hours. If there is less water, it can be completed in half a day or even less time. In addition, explosive oxygen has other benefits, which are not only conducive to the respiration of fish, but also can increase the reproduction of some aerobic bacteria.
3. Heating: Heating is also one of the ways to trap water quickly. Its advantage is to reduce the hardness of water and allow chlorine to recover quickly. However, heating also has some drawbacks, a high water temperature, dissolved oxygen will drop, oxygen will be discharged, which is not conducive to the breathing of fish, so only a small amount of water can be used this method.
