First, the correct way to change water for fry. Do not change the water for fry too often to avoid irritation. Usually, old water containing fry should be poured into new water, and the process must be slow. Do not change the water violently, it will cause fluctuations in water quality and water temperature, which is not conducive to the health of fry, and even make them die. Usually change it once a week. After changing the water, separate the big fish from the small fish in time to avoid the big fish eat small fish.
Second, what should I pay attention to when changing water? 1, trapped water in advance: tap water is generally used to raise fish at home. Although this kind of water is not polluted, it contains residual chlorine, which is harmful to the health of fish. Therefore, we must collect the water in advance and put it in the sun for a day to let the residual chlorine dissipate and ensure the safety of the water body.
2. Pay attention to the water temperature: When changing water, be sure to pay attention to the water temperature. Changes in temperature will stimulate fish to some extent. Usually, the new water is higher than the old water by 1℃, but the temperature difference should not be too big. It is best to keep the temperature before and after changing the water, so that the fish can adapt more easily.
3. Proper cleaning: Every time you change water, you should properly clean the fish tank, pump away the dirt at the bottom of the tank, and then replenish new water from the tank wall, so that the water quality will remain stable. If you don't pay attention to cleaning, dirt will accumulate and pollute the water body.