One thing you might want to try is getting a small mag-light. The one that is about 5 inches long and takes 2 AA batteries. When candling anything dark make sure you put in fresh batteries. With the mag lights you can turn the light so that you have an intense spotlight. Then you will have to shove him in a closet and close the door so it is absolutely dark!!! Find the airsac and then position the light so that it is on the side of the egg pointing up towards the airsac. If you angle it right you should be able to see the larger veins buy the egg shell. I hope this makes sense and you can know sooner if they are growing. This is the only way I can tell on darker eggs and sometimes they are still to dark. Good luck next time. Jenn