The eggs are extremely fragile but able to withstand a significant degree of disturbance. The eggs have a somewhat sticky consistency and may be located in a spawning substrate with a little bit of work. Please be advised that the incubation time for Nothobranchius korthausae eggs can be as long as three to four months or even more, depending on the temperature of the incubation environment, the moisture content of the substrate, and other factors. It takes a substantial amount of patience to check on the development of the embryos every three to four weeks.
After three to four months of incubation, hatching is frequently stimulated by putting the eggs in shallow water in the breeding tank (container), where the eggs' wetness stimulates hatching. Do not be tempted to hatch the eggs early, since this might stunt the growth of the fry. If the eggs do not hatch after two to three weeks, return the substrate to storage. Continue this procedure until the eggs hatch. Some breeders even re-dry and re-wet the substrate in 4 to 6 weeks after substrate re-drying. This often leads in more hatchings of slower-developing eggs. Eggs with visible eyes and active embryos indicate that they have attained development. After hatching the eggs, often change the water to increase the growth rates of the fry. The fry are quite small at birth and must be fed Paramecium for the first three to four days. You may then give them Baby Brine Shrimp, Vinegar Eels, Banana Worms, or Microworms. If the water is maintained as directed and the fry are fed a range of meals, they will attain sexual maturity within five to six weeks.