I'd just wait until day 10 candling.What do you think about the eggs I deemed infertile? There's a ton of them and if they have no hope, I want to take them out right away to open the incubator up a bit and improve the airflow. The ones that have development but look questionable, I can leave for a few more days, but the empty-looking ones can probably go now.
This was my first hatch schedule:
First Hatch - I candled on day 7-10-14-18.
Day 7 - didn't see much but the air cells, which I outlined with a pencil every time I candled, maybe some veining and lumps..maybe moving...I was very disappointed.
Day 10 - could definitely see veins and some movement...maybe some clears and blood rings.
Day 14 - saw much more definition of shape, movement and realized what I had seen the previous times. Clears and blood ring more obvious.
Day 18 - pulled the now very obvious clears and blood rings. Viable chicks almost filled egg and wasn't as much movement.