in a large fish tank? Generally, a large fish tank needs to change all the water only after the fish is cured of illness. Before changing the water, the fish should be fished out and put into other places for temporary cultivation, then the water in the tank should be emptied and the trapped water should be injected into it. If you can't trap so much water, you can also inject tap water directly and use chlorine remover to trap water. After that, they need to filter and explode oxygen, and at the same time, they need to use heating rods to raise the water temperature, and when the water is well raised, they can put the fish in.
should we pay attention to when changing water? 1. Frequency: First of all, we should pay attention to the frequency of changing water. Because the size of the fish tank is different and the number of fish is different, the frequency is not fixed. According to the maintenance of water quality, decide the cycle of water change, usually do not change too often, otherwise it will stimulate the fish, five to seven days can be changed.
2. Method: Never change the water in the fish tank by force, otherwise the water quality and temperature will fluctuate, which is harmful to the health of the fish. Normally, you need to find a pipe to pump out part of the water at the bottom of the tank, and then exchange the trapped water from the wall of the tank, so as not to disturb the fish.
3. Water temperature: The fluctuation of water temperature is also very harmful to fish, so it is necessary to ensure that the temperature will not change too much before and after changing the water. You can measure the temperature of the old water first, and then add hot water to the new water to raise the temperature, so that it is consistent with the water temperature of the fish tank, the difference between the two is between 1-2 degrees Celsius.
