? If only live fish are raised, some fish with low water quality requirements do not need to change water, such as goldfish, guppy and so on. However, it is not good to raise fish in this way. On the one hand, not changing water will make the water more and more turbid. On the other hand, fish may have some problems due to the aging of water quality, the most common is that they do not grow up, and all of them become old fish.
for fish 1. Frequency of water change: Although water change can maintain water quality, it is not harmless to fish. If water change is too frequent, it will stimulate fish and may produce some stress reactions, which is harmful to the health of fish. So you can usually change it once a week, and if you have a filter, you can also change it once a half month.
2. Control the amount of water: Do not change too much water for the fish, otherwise the water quality will fluctuate greatly, which will also affect its survival. Usually, the amount of water is related to the frequency of changing water. If it is changed frequently, it will be changed less. If it is not changed frequently, it will be changed more. If it is changed once a week, it will be changed by one fifth at a time. If it is changed once a half month, it will be changed by one third.
3. Method and steps: Before changing the water, you need to trap the water first, that is, put the tap water in the sun to dry, so that you can remove chlorine. After the treated water is ready, the water at the bottom can be pumped out with a pipe, and then the new water is slowly added from the wall of the tank, so as to avoid fluctuations in water quality and temperature.
