In the spring in the south, it is the breeding season for goldfish. From late March to early April, the goldfish can be removed from the wintering room before the Ching Ming Festival, and is reared in the open space, commonly known as “out of potsâ€. At this time, the temperature changes greatly, goldfish are most vulnerable to disease, and the mortality rate is also high. At this stage, we must pay attention to changes in the weather. At night, we must cover it with a curtain to prevent the cold. During the day, the curtain will be lifted to the full sun. If goldfish are wintered at low temperatures, they are generally not fed, and they start feeding after they have been put out, but they should not feed too much. Every morning, the fish and fish are picked back, rinsed to remove the dirt, and then fed to the goldfish. Start to feed less, after 1 week, you can feed more. Around 3 pm every day, dust and other dirt floating on the surface of the water are removed with a cloth, commonly known as "hit." Then use a cloth pocket to gently turn 2-3 times along the fish tank and the pool of water. After the dirt in the water settles to the bottom of the tank and the pool, the sediment will be sucked out with a rubber tube. The amount of water absorbed is about the total amount. 10% to 40%. If the gold is at low temperature for the winter, the body of the fish is thin after it is out of the basin. Take special care when taking water. Then add the same amount of fresh water, about 4/5 deep, to maintain a constant water temperature. Water change is usually about 2 weeks. When changing the water, remove the fish first, wash the fish bowl, replace it with new water, and put the fish in the pot. If the container is large, the sewage can be discharged first, then the fish can be fished and the container can be washed to remove the dirt. Do not completely remove the moss accumulated on pots or concrete side walls made of ceramics. When cleaning, only remove the impurities on the surface and protect the mossy bottom. Because the moss flannel can produce oxygen under daytime photosynthesis, it can also protect the surface of the fish from being scratched. The mucosa of the goldfish body has the protective function of preventing the invasion of bacteria. The smooth and soft moss fur can also adjust the water temperature and beautify the environment of goldfish, which is beneficial to the life of goldfish. It is normal for the pool and basin water to turn green.