- Mar 22, 2016
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Sorry for taking over your thread @fil76! 

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https://www.backyardchickens.com/articles/hatching-eggs-101.64195/So, after humidity at 48-50 for the first six days, I've replaced the water container with a smaller one, aiming for 38-40%. Will that be ok or should I aim for lower after having humidity a bit high for six days? They are bantam eggs btw. I've read some people think bantams need slightly higher humidity.
Thanks!https://www.backyardchickens.com/articles/hatching-eggs-101.64195/
just over halfway down this article has a picture of the egg and it's air cell on day 7, 14, and 18 you should alter your humidity to try to get your air cells to match that as closely as possible.![]()
How would you go about calibrating your temp and humidity controllers if digital with probes?I use 30 - 40 followed by 65. Humidity is a tool to manage your air cell size. If your humidity is too high during the first 17 days, you have little alternative available to you to increase the air cell size so your chicks don't drown in the shell. If you run dryer, you can always increase humidity towards the end if needed to slow air cell growth.
No matter what you do, calibrate your equipment, especially your thermometers. A thermometer is totally useless if it's not calibrated.