It takes about 2 - 3 days for angelfish eggs to hatch into fry after the angelfish spawn. During the spawning process, the female fish lays eggs, and at the same time, the male fish fertilizes the eggs. After the spawning is over, both the female and male fish will guard the eggs together. They take turns using their pectoral fins to fan the water flow to ensure that the fertilized eggs have sufficient oxygen. Unfertilized eggs or those infected by water mold will turn white and become moldy. The parent fish will peck at these eggs to prevent infection.
During the breeding process of discus angelfish, it also takes about 2 - 3 days for the eggs to hatch into fry after spawning. The newly hatched fry attach themselves to the spawning cylinder and survive on their own yolk sacs, so they don't need to be fed. After 1 - 2 days, when the nutrients in the yolk sac are consumed, the fry start to feed on tiny plankton or special fry feed.
To ensure the successful breeding of angelfish, the following points need to be noted:
Water Quality Management: Keep the water quality clean, change the water regularly, and monitor indicators such as ammonia nitrogen, nitrite, and pH value.
Temperature Control: The water temperature should be maintained between 24 - 28°C to promote the growth and reproduction of the fish.
Selection of Parent Fish: Select healthy, mature parent fish of moderate size for pairing to ensure the success rate of breeding.
Fry Care: Newly born fry are very fragile and need special care. Feed them tiny plankton or special fry feed, and gradually switch to suitable fish food as they grow.
By taking the above measures, the breeding success rate of angelfish can be effectively increased, and the healthy growth of the fry can be ensured.