1. Choose parent fish: To breed koi, we must first choose parent fish, and we must choose sexually mature and physically strong koi, so that the offspring bred in this way are also better.

2, parent fish in the tank: After the parent fish is prepared, it needs to be put into the breeding tank, and the ratio of male to female is usually 1: 3.

3. Breeding environment: In order to ensure the rapid reproduction of fish, a good environment must be created, the temperature should be kept above 18 ℃, and oxygenation should be carried out at the same time.

4. Fishing out the parent fish: After laying eggs and fertilizing, the parent fish can be fished out to prevent it from eating the eggs.

1. Parent fish: Koi needs to be fished out as soon as possible after reproduction, because parent fish may eat fish eggs as food. When feeding alone, it is necessary to ensure sufficient oxygen and food in the fish tank, and the water temperature should be the same as that in the spawning pool, so as to avoid stress reaction caused by excessive temperature difference. The parent fish can reduce the frequency of changing water just after laying eggs, because the frequency of changing water will also stimulate koi fish.

2. Fish eggs: The incubation temperature of fish eggs needs to be controlled at about 23 ℃. As long as the water temperature is suitable, it can be hatched in 3-5 days. During hatching, breeders need to observe carefully and fish eggs that are not fertilized and moldy in time to avoid polluting water quality. Newly hatched fish don't need to be fed, just keep enough oxygen. Small fish should be fed 3 days after birth. Cooked egg yolk or abundant shrimp eggs can be selected for the first feeding