A pair of Diamond Tetras will spawn in an aquarium with an area well planted including fine leaved plants creating a well shaded area. The pair should be well conditioned before hand with rich food including live food.
The water should be very soft and a pH of 6 is preferable. A temperature of 28 degrees C (79 degrees F) is suitable.
The fish usually spawn in the early morning. They will eat their eggs and are normally removed after spawning. The eggs normally hatch in 36 hours and the fry are usually free swimming in 4 days.