goldfish have low demand for food. Without feeding, goldfish will feed on microorganisms or plankton in water. Therefore, goldfish can survive for about 20 days without feeding. However, if you don't feed for a long time, it will cause serious harm to the health of goldfish, and it is very likely that you will no longer grow up in the future. This kind of fish has slow metabolism and energy consumption, and can rely on plankton or algae to survive. However, in the environment of long-term lack of food, they will stop growing, start to lose weight and finally die. Also, if you don't feed for a long time and suddenly feed it, this kind of fish may overeat and finally die.

goldfish eat miscellaneous food, so rich food can be chosen as the most bait. You can choose live food, such as red worms, fish worms, etc., but this protein content is high and should not be fed every day. You can also feed some green plants such as algae, and you can also choose some synthetic feeds. First of all, this kind of food should be able to smell fish and shrimp, and then this kind of food should be put into water, preferably feed that will not pollute the water quality. There will be no oil flowers on the water surface of feed with good quality.

Also pay attention to the size of food, not too big, otherwise it is not easy to digest, and not too small, too small will cause goldfish to keep eating. Pay attention to hydrophilicity when choosing food, and choose substances with good hydrophilicity that will not expand in water but are soft and easy to deform. Finally, we should pay attention to the composition and collocation of food and pay attention to balanced nutrition.