It is possible to raise ornamental fish with river water, but it is not better than tap water. Although the river water in the wild looks clean, there may be some pollutants in the water, which cannot be confirmed. After disinfection and processing by waterworks, tap water is basically free of pollution. Although there will be a small amount of chlorine residue, it can be quickly dissipated by trapped water, so it is more suitable for fish farming.

1. Water quality: Pay attention to water quality first in fish farming. Whether the water is good or not determines the health of fish. Usually, in order to maintain the water condition, it is necessary to change the water every once in a while, but it is impossible to change too much water every time. Although changing more water can improve the water quality, fish may not be able to adapt to the fluctuation of water quality, resulting in stress reaction.

2. Water temperature: Fish belong to temperature-changing animals, so their adaptability to water temperature is weak. If the temperature changes too much, fish will feel uncomfortable. Usually, if tropical fish are raised, the water temperature should be kept above 20 ℃, and the water temperature of wide-temperature fish should be kept between 5-30 ℃.

3. Dissolved oxygen: If it is a large fish, it also has certain requirements for dissolved oxygen in water. In order to meet their breathing, it is necessary to use an oxygen pump to oxygenate the water to improve the overall dissolved oxygen.