there is not 2 air cells- if there is clear on the pointed end after day 20 the egg didn't finish developing right and might not hatch. you can keep it in the incubator if you wish and still try- 2 of mine were clearish on day 18 and they hatched. the clear on the point is undigested fluids.
I assure you, there are 2 air cells. Please re-read what I said happened to the egg. The egg arrived with a detached air cell. It healed. I laid it on its side. It ripped. I can see the rip when I candle. There is a very well defined 2nd air cell in this egg. I am thinking it might cause a deformity or malposition.
This is a different case than what you are describing with the yolk in the bottom, I know exactly what that looks like.
This rip killed 1 egg. The other egg that ripped appears to have lived. It has red blood vessels even though I thought the rip killed it initially.
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