Rosy barbs scatter their eggs. The eggs are sticky and they fall to the bottom of the tank. The ideal breeding Temperature will be 22 to 25 degrees C.
Identify a female which is ready to breed. Females with eggs have a bulge. Males which are ready to breed usually turn bright red. Shift the male and the female to the breeding tank.
It is better to have a coarse substrate in the breeding tank. This permits the eggs to fall through the substrate into the tiny spaces between the substrate material. The eggs stay protected as rosy barbs will eat their own eggs if they can access them.
Once the breeding is over (this can be seen from the female’s belly which would have become slim by now), shift the male and the female to the home tank.
The eggs hatch in about 30 hours. The fry will be free swimming by day 5. You can feed them infusoria or newly hatched brine shrimp.