What is the zinc penny supposed to do?13 left for day 16-17, I am heating up my hatching incubator I am moving my eggs to tomorrow for lock down. It is still air foam farm innovators. I have distilled water in the water troughs after dry hatching first 18 days. I also have pennies before 1982 in water for the zinc. I placed the curve of the wire flooring so the curve is down, and the eggs will not roll towards the walls of the incubator.
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I also put down rope for the eggs to rest while hatching, and the hatched chicks cannot play soccer with the unhatched. (Sample eggs on fish stringer rope works great.)
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When adding the water to the troughs, take the floor wire out first, water clings to the wire floor and you don't want eggs to touch wet.