1, raising freshwater fish is actually very simple, just pay attention to a few points. It is also important, that is, water. Fish can't leave water, this is the law, and you can't leave water all your life. Therefore, raising water is the key. Tap water in the city can't be directly used for fish, because chlorine and bleaching powder are added to tap water, so the fish can be directly replaced with tap water, which may lead to chlorine poisoning and death, or even white spot disease. Tap water can only be used for fish after it is trapped. The trapped water is filled with water in an open container, and then exposed to the sun for two days or more, allowing chlorine gas to evaporate by itself.

2. Also pay attention to whether you are raising tropical fish or cold water fish. If you are raising tropical fish, you need to warm it in winter.

3. Pay attention to the temperature difference of the water when changing the water for the fish. The temperature difference between the water in the fish tank and the water to be changed is not more than two degrees for the fish. If the temperature difference is too large, the fish may upset because of the alternation of hot and cold, and may be directly killed.

4, speaking from experience, when changing water, don't change all the water in the fish tank, just change one third and one quarter at a time. Leave some old water to make the fish more adaptable.

5, feeding, feeding fish should be regular and quantitative, can not be fed more, feeding too much water is easy to get dirty, and fish resistance is reduced, easy to get sick, and in severe cases, fish will suffer from gastroenteritis, enteritis is a fatal disease in ornamental fish, because enteritis is really difficult to treat.