Tap water is the best for fish culture. Tap water itself is easily available and pollution-free, so fish farming is very suitable. However, after disinfection, there will be a small amount of chlorine residue, so it is necessary to remove chlorine by trapping water. It should be noted that river water or well water is usually not used to raise fish. River water may contain some pollutants, which are still risky for ornamental fish, while well water is groundwater, with low temperature and insufficient solution.

1. Drying: There are many methods to remove chlorine from tap water, and drying is the most commonly used method. After connecting the tap water with a basin, put it in the sun to dry for a few days. The drying time is generally related to the season. In summer, the temperature is high, so it can be dried for one day. In winter, the temperature is low, so it takes a few more days to dry.

2, oxygenation: By oxygenating tap water, chlorine removal can also be achieved. This method is very efficient, and it usually takes only one or two hours to remove chlorine, but there is a certain limit on the amount of water. If there is more water to be changed, this method often doesn't work.

3. Medication: If the amount of water to be changed is very large, it is too late to rely on drying and oxygenation. The fastest way is to use medicine. The medicine here refers to the chlorine remover, and the common one is Yulebao. As long as the dosage is controlled, it can purify the water quality and has no side effects on fish.