The main reasons why goldfish don't eat include the following:
Water Quality Issues: Goldfish are very sensitive to water quality. Sudden changes in water quality or a decrease in dissolved oxygen levels can lead to a decrease in their appetite. Regularly changing the water and maintaining stable water quality are crucial.
Indigestion: If you feed too much at one time, goldfish may suffer from indigestion, resulting in their refusal to eat. Appropriately adjusting the water quality and raising the water temperature can promote digestion.
Illness: When goldfish are sick, they usually lose their appetite. Common diseases include enteritis, gill rot, etc. Promptly treating the diseases is the key to restoring their appetite.
Parasite and Bacterial Infections: The presence of parasites on the fish body or bacterial infections can affect the appetite of goldfish. Using anti-parasitic medications or performing medicated baths can effectively address these issues.
Environmental Changes: Changes in the layout of the fish tank or the fish population can make goldfish feel stressed and affect their appetite. It is necessary to give goldfish time to adapt to the new environment.
Feed Replacement: Suddenly changing the feed can cause a stress response in goldfish, leading to a decrease in their appetite. Gradually transitioning to the new feed can avoid this situation.
Spawning or Breeding Period: During the spawning or breeding period, goldfish may temporarily stop eating. This is a normal phenomenon, and they will resume eating after a period of time.
Large Temperature Difference: In spring and autumn, there is a large temperature difference between day and night. Changes in the dissolved oxygen level in the water can affect the appetite of goldfish. Paying attention to keeping warm and avoiding large temperature differences can help solve this problem.
Solutions and Preventive Measures:
Keep the Water Quality Clean: Regularly change the water, and use a filtration system and water quality testing kits to monitor the water quality.
Feed in Moderation: Avoid overfeeding at one time. Feed regularly and in appropriate amounts to prevent indigestion.
Treat Diseases Promptly: When diseases are detected, treat them promptly and stop feeding during the treatment period.
Pay Attention to Environmental Changes: Try to avoid frequently changing the layout of the fish tank or the fish population, and give goldfish time to adapt.
Gradually Replace the Feed: If you need to change the feed, gradually transition to the new feed to avoid a stress response.
Pay Attention to Temperature Differences: In spring and autumn, pay attention to keeping warm and covering the tank to prevent large temperature differences from affecting the dissolved oxygen level in the water.