After a long period of low temperature and lack of sunlight in the winter, the goldfish were of weak constitution, and they began to move outside the open air before and after the vernal equinox. The water change of the fish needs to be extra careful and swift. Usually change the water once a day, or as appropriate, every other day, each change the amount of water in the total amount of about 10%. At this time the water temperature is low, the amount of dissolved oxygen in the water is large, the amount of goldfish is still small, the oxygen consumption rate of the fish is low, and a small amount of water change can meet the needs of goldfish life. In the late spring, as the temperature rises, the food intake of goldfish begins to increase, the amount of activity increases, and the oxygen consumption of fish increases accordingly. The amount of fish excrement increases significantly, and the amount of water to be changed each day should gradually increase.
Change the water time is best in the afternoon after 4 o'clock, when the goldfish has been full, the water can be removed when the basin of the remaining bait and all the dirt, then swap the appropriate amount of water over the sun. The method of changing water is to use gauze nets to remove goldfish pots, and float water and foam in the pool, and then use gauze net to gently turn the water in the goldfish basin and pool in the same direction for 3 to 5 turns. Contaminate the water together, and then use a straw to suck the dirt out. Then, along the edge of the basin and the pool, slowly inject into the drying water.
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