What harm will fish do if they eat expired fish food?

The fish feed that has expired or been opened for a long time is harmful to fish mainly from aflatoxin produced in the process of metamorphism in protein and aldehyde substances with great toxicity produced by fat deformation.

Due to various factors, feeding expired and deteriorated feed occurs unconsciously, and the feed is mainly made of various animal and plant proteins. If the service life is too long, or it is damp and moldy, and protein deteriorates, aflatoxin and nitroso will be produced, which will cause great damage to the liver of fish.

Extended information:

Precautions in selecting fish feed:

1. Color degree: If fish feed is found to be too light or very strong in color, most of it is added with other pigments and preparations, so it is best not to buy it.

2. The smell of drugs is heavy: The finished fish feed generally has the smell of soybean meal and fishy smell of fish meal. In addition, some fish feed will also add antibiotics, such as allicin, so the feed has the smell of drugs.

3. The fishy smell is very heavy: the fishy smell of this fish feed is persistent and light, and it will remain fishy for a long time when put in water. If it is found that the fishy smell of fish feed is very strong and disappears quickly after soaking in water, it is not recommended to buy it.

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