First of all, you should put five females and one male crested gecko in an aquarium. This is the most appropriate number of females for one male and the most traditional group for breeding.
Make sure you have purchased the male crested gecko not less than 9 months of age. The age of female crested geckos should be between 12 to 14 months.
Temperature is the most important element that plays a vital role in normal breeding. Make sure the temperature of the aquarium is between 75 to 80 degrees Fahrenheit at the day time and not less than 70 degrees at night.
Always mist the aquarium at least twice on a daily basis in order to keep the habitat of crested geckos moist which is very helpful in breeding.
You should feed the crested geckos with crickets dusted with vitamin D3 and calcium power and also with gut-loaded insects which will help in keeping the breeding healthy.
Now put an egg laying container into the aquarium and make sure that it is lined with the loose substrate in aquarium because the female crested geckos will lay eggs in this material.
Do not forget to remove the eggs immediately and keep them in lidded container which is lined with moist substrate. The wait with patience as the hatching process usually takes 70 to 80 days.