Candling question: size of air cell day six

[LarissaCluck]

I am on day six of incubating and candled the eggs again today. Threw away a few unfertilized eggs and saw some good veining in the others.

My question: How big should the air cell be at this stage? Some of my eggs had as much as air cell or blank space in there. Is my humidity to low, or is this fine/normal for this far along?

 

[LarissaCluck]

Pretty please? Anybody????


I want to know whether I need to increase the humidity/ It's been from 30-40%

 

[wsdareme]

Here's one source, just scroll down the page: http://www.extension.umn.edu/distribution/livestocksystems/di0631.html

Here's another: http://shilala.homestead.com/candling.html