1. Put a clean porcelain plate and water plants with wide leaves in the tank as a breeding place. At the same time, put the sinking wood for the male fish to avoid. When the female black devil fish lays eggs, it is in a spray shape, and the eggs are sprayed out one by one. It is not advisable to be disturbed when laying eggs. A slight abnormality will cause the female black devil fish to stop spawning.

2. After spawning and fertilization, take out the parent black devil fish out, and add a little methyl blue to the water to prevent disease. At the same time, the unfertilized fish eggs were taken out to avoid affecting the water quality.