Solutions to koi fish ovulating in the fish tank:

1. When koi fish lay eggs in the tank, the parent fish and eggs need to be separated in time to avoid the occurrence of parent fish. Ingestion of fish eggs.

2. Distinguish between fertilized eggs and unfertilized eggs. Generally, fertilized eggs are transparent and yellowish. Take out the fertilized eggs for isolation, and clean up the unfertilized ones to prevent water pollution.

3. Fishing out the eggs for artificial hatching can improve the survival rate of koi.

Precautions when koi spawns:

1. During koi spawning, it is advisable to use acidic water and raise the water temperature to 18-25°C. Ensure the water quality is clean and thorough, and ensure there is enough oxygen in the tank.

2. After the fish eggs are fertilized, you can wait for the fertilized eggs to hatch. If you encounter rainy weather, it will be difficult for the fertilized eggs to hatch, and some will become moldy and hairy. The owner can move the fish tank to a ventilated place to reduce mold growth.

3. If a female fish ovulates, a male fish must release sperm so that it can become a fertilized egg. If the male fish does not release sperm for a long time after the female fish ovulates, you can try artificial sperm ejaculation. Gently press the male fish's abdomen with your thumb to expel semen.