2. Goldfish is a kind of temperature-changing animal, which has strong adaptability to water temperature. Its body temperature changes with the water temperature, and it can survive at the water temperature of 0-39 degrees Celsius. But goldfish can't adapt to the drastic change of water temperature, and the sharp rise or fall of temperature over 5 degrees Celsius may endanger the life of goldfish.
3. Goldfish has a strong adaptability to water quality, and has a certain ability to resist dirty water and acid and alkali. Water with pH value of 5.5 ~ 9.5 can survive. Alkaline water is more suitable for goldfish growth, but the alkalinity should not be too high and the pH value should not exceed 8.5. Goldfish will lose appetite, move slowly and grow stagnant under acidic water.
Extended data:
Precautions:
1. Before buying goldfish, clean the goldfish bowl, preferably with salt water, and then rinse it with clear water.
2. The best water for keeping goldfish is river water, and it is best not to use mineral water. It is best to expose the river to the sun for half a day to increase the oxygen content in the water.
3. It is best to place the fish tank in a sunny and ventilated place, and pay special attention to the stocking density of goldfish to avoid goldfish from dying due to lack of oxygen.
4. When feeding goldfish, avoid putting too much at a time. It is not that goldfish will die if they eat too much, but that feed pollutes the water for too long, resulting in insufficient oxygen supply in the water.
Baidu encyclopedia-goldfish