BCM are going to make it even tougher in styrofoam. There is a lot of debate over what is the proper humidity on those eggs just because of the extra pigment layers on the eggs. The posts that make the most sense to me are the ones that say they need an even lower humidity because the shells don't lose moisture as easily as white or light brown eggs. I would say 50% was a little high, even for lighter eggs. I would be very curious for you to follow Amy's advice. When she gets here, you will hear all about "dry incubation". I give her a hard time, but I believe in her when it comes to styrofoam
Well, these eggs are just my 1st gen cross between Red Sex-Link and BCM roo. So I rarely get eggs that are on the BCM scale, and when I do they are no higher than a BCM 4. But as my post to WVduckchick just stated, I can't see through them very well even with an Ova Scope HI.
I did really try to follow Amy's dry incubation advice, although I screwed up by putting water in on day 0 and a little on day 101.
Humidity was as follows on day #'s:
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
64% 50% 51% 42% 41% 40% 38% 35% 31% 31% 40% 38% 35 31% 27% 22% 22% 22% 22%