Goldfish defecate and stretch long lines, which may also be related to bacterial infection. Pet owners can add antibiotics to the fish tank for medicinal bath treatment. The healthy goldfish stool is the same color as the food it eats, but it is of moderate length and can be separated from the fish quickly.
Extended data
According to Yangzhou Evening News, there is no need to change the water in the fish tank in winter. You can change the water according to its turbidity. If the water is easily turbid, it is necessary to increase the frequency of changing water appropriately. If the water is clear, you should reduce the frequency of changing water appropriately. In order to keep the water temperature balanced, the amount of water changed should not exceed one third of the total water.
Secondly, the fish tank should be placed in direct sunlight, so that it can be heated by the sun and sterilized by ultraviolet rays. In addition, goldfish belong to social animals. People can keep more goldfish in the same fish tank, but make sure that each goldfish has enough room to move.