It takes 2 years for carp fry to grow to 3 kg under normal feeding. Because they don't grow very fast in the first year of their birth, they can only grow by 1 kg at most in the first year, and most of them will not exceed 1 kg. In the second year, their growth speed will accelerate, and they can grow 1-2 kg a year, so the general carp can grow to 3 kg after being born about 2 years ago. Now there are many carp fed hormone feed, so that they can grow to 3 kg in one year.

1. Adequate space: If carp want to grow faster, it is necessary to ensure that they have sufficient living space. Although they are small in size in childhood, they grow faster. Breeders need to reduce the feeding density to avoid the shortage of space.

2. Adequate oxygen: Breeders should also keep enough oxygen, which can speed up food digestion and make them grow better. In addition to installing an oxygen pump, the breeder can also install a filter, which can also keep enough oxygen.

3. Reasonable feeding: If you want carp to grow fast, you should feed them more food. When feeding food, we should follow the regular and quantitative feeding method. It is necessary to ensure their adequate nutrition and balanced nutrition.