It must just be a bad time for shipped eggs, I candled my buff leghorns last night and only 3 appear to be developing?! Out of 18! I am 98% sure its just shipped eggs and not my coolerbator because I just moved 5 of my 6 "mixed flock" eggs into my brinsea for lockdown and they were swimming around like crazy and have perfect air cells, will see on sunday what the results are.
I am still kind of doubting the airflow in my cooler Bator though? I have a quite large fan in there but this last week I have been getting uneven temps, but its with my digital thermometer. My regular mercury one says its spot on wherever I move it. I think I need to toss the digital and just keep the mercury.
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My fan if any coolerbator users see an error with this please let me know, I'm loading it up again tonight with more bobwhite quail and apparently chicken eggs....I think my order got mixed up with the sellers other customer because they are definitely not quail eggs!
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My digital thermometer
I also have my three shipped brahma eggs, that made it to lockdown, in the racks in my brinsea (they have about 75% of the top egg sticking out and aren't in super tight so I hope it works).