I kept mine closer to 78 because I thought the higher the temp the more chance of males not too sure anymore. The temps should stay between 72-78 degrease not to exceed 80, but the real key I think is consistency what ever temp you choose try to keep it the same as much as possible. That's why I used an incubator. However if your temps stay within the range on a consistent basis like say in a closet you should be fine. Hope this was of some help.