for the fish tank. Before changing the water for the fish tank, first prepare the new water. Because the water usually used is tap water, it needs to be treated by water trapping, that is, to put the water in the sun for a period of time, so as to remove chlorine. After preparing the new water, you can pump out part of the old water in the fish tank. You can use a pump to pump out the water, or you can find a pipe to siphon out the water. After pumping, you can inject new water. Be sure to pour it in slowly from the wall of the jar. Don't change the water violently.
should we pay attention to when changing water? 1. Cycle: We need to pay attention to the cycle when changing water, neither too frequently nor for a long time. Frequent water changes will lead to large fluctuations in water quality, which will stimulate fish to a certain extent. Not changing the water for a long time will increase the ammonia nitrogen content in the water, which is also harmful to fish. It is usually changed every five to seven days. If the filtering effect is good, you can consider changing it every two weeks.
2. Amount of water: The water cannot be completely changed each time, and the amount of water often has a certain relationship with the cycle. If the water is not changed for a long time, it should be changed a little more each time, but not more than one third of the total water volume. If you change the water frequently, you can change it once less, about one fifth of each time.
3. Temperature: In order to avoid the adverse effect of water temperature fluctuation on fish, the temperature must be measured before changing water to ensure that the temperature of old water and new water is close to the same. The temperature can be adjusted by adding hot water or cold water to the new water according to the temperature of the old water, and the temperature difference is controlled within 1-2 deg C.
