BrinseaUS
Songster
There are a few ways to tell if your humidity is correct without using a hygrometer! You can either mark the air cell or weigh the eggs periodically throughout incubation. Chicken eggs should lose 13% of their weight from beginning to end of the incubation, so if you weigh them every few days you can calculate if they are losing enough weight. Too much weight loss means not enough humidity, not enough weight loss means too much humidity. We also have an article on our website that explains it in greater detail: Humidity in IncubationHow does brinsea expect someone to know the humidity if there’s no humidity reader with the incubator?