It is not absolutely necessary to sex your tetras before you begin breeding because you can put several into the tank together and breeding should occur.  However, if you want to sex your tetras, male and female tetras have some distinct differences that can help you tell them apart.  Female tetras tend to be wider and fatter than male tetras. Some breeders also claim that male tetras have a straight stripe and females have a crooked stripe. Evening is the best time to introduce your adult tetras into the tank, so plan to put your adult tetras into the tank after the sun has set. Keep in mind that the tetras that you use for breeding will have to be at least 12 weeks old or breeding may not be possible. Allow the fish to stay in the tank for a day or two. Tetras should spawn after being kept in the tank for about one to two days. If breeding is not happening, then check the pH and temperature of the water, soften the water a bit more, and adjust the lighting as needed. It may take some time and experimenting to get the conditions just right for your neon tetras to breed. Changing the water softness seems to trigger spawning because it mimics rainfall. Try adding a large amount of soft water to the tank if your neon tetras are not spawning after a few days. Fish eggs are small and hard to see because of their translucent color, but you may be able to see them in the gravel or on plants in your breeding tank. As soon as you notice eggs in the tank, make sure that you remove the adult tetras from the tank or they may eat the eggs. There may be between 60 and 130 eggs, but not all of them will hatch. After the eggs are lain, they will take about 24 hours to hatch. You can expect about 40 to 50 baby tetras to hatch from the eggs. The baby tetras will look like small splinters of glass swimming around the tank.
حدد جنس أسماك التترا. ضع أسماك التترا البالغة في الحوض. عدل الظروف إذا لم تتزاوج أسماك النيون تترا. أخرج أسماك التترا البالغة من الحوض. انتظر فقس صغار التترا.