Being .5F off isn't a big deal, but that will affect the hatch date, either speeding it up slightly, or being a little slower. More than that continually throughout and you chance possibly having deformities and death.Ok once I figure out which thermometer is best calibrated, where in the incubator should I put it and if it's not exactly 99.5 in there is it better for it to be slightly above or below

and Welcome to Backyard Chickens.
to have you here with us. Enjoy your time here at BYC!
