I didnt put any water in the incy until i stopped turning - day 14. I was told they take 16-18 days and mine started hatching on day 15 and went on for two days.
I hatched 16 out of 23 eggs.
If you dont already know this, don't make my mistake because i am likely to lose 4 of mine. I was told to put kitchen roll in the bottom of the incubator the day before the hatch because of the quails tiny legs going through the grid. But, it seems to have created a problem with splayed legs because it is too slippery for them.
I have now learned that I should have used the rubberised matting not kitchen roll - annoyed about that because of the 4 with splayed legs will need to be culled if they dont recover on their own ( unlikely) - they are too tiny to
splint I think.
good luck with your hatch.