The fish tank does not change the water for a year is not allowed. If the water is not changed for a long time, the water quality will be aging, and the concentration of some harmful substances in the water will also increase, which is not good for the health of the fish, even if it can be kept alive, it will also grow into an old fish, which is not good-looking. Usually according to the maintenance of water quality, one to two weeks to change the water, if too much fish, water quality deterioration fast, five days to change.
1. Trapped in advance: To change the water in the fish tank, you must use the trapped water, so you need to be trapped in advance. Generally, 1-2 days before preparing to change water, the water is connected and put in a sunny place to dry, so that the chlorine in the water will volatilize out, thus avoiding harm to the health of fish.
2. How much water to change: Generally, the amount of water to change is about one fifth to one fourth. If the water is not changed frequently, you can also change a little more at one time, but it should not exceed one third of the total amount of water. Changing too much water will stimulate the fish body, which is harmful to their health, and changing too little water will not improve the water quality.
3, change water method: must not violence for water, directly into the new water into the fish tank. The old water needs to be pumped out with a pipe first, and then the new water is slowly poured in from the tank wall, which will not cause fluctuations in water temperature and quality, and the fish can adapt to the new water.
