Quote: It's forced air. Both thermometers said 99-100. The humidity was dry for the first 18 days then between 60 and 77 when the first hatched. I have a qfg digital hydrometer. I don't know what happened. The chicks that hatched are big and healthy. I forgot to mention that 15 were shipped eggs. I let them set for 3 days, all had nice air cells and growing well.
Mich you did dry hatch? meaning what? You need to use humidity to reach the necessary weight loss in the egg, too dry and they cant turn, too wet and they drown. Dry hatch doesn't imply no water in the bator, it means you use it as a tool to keep weight loss on target, sometimes you need more sometimes less depending on your room conditions etc. Do you think your chicks were stuck? It sounds to me like you ran dry dry and lossed too much. also did you weigh them throughout? (I don't but some do)
I don't mean to jump in here, but this just happened to me. This past hatch was horrible, very much staggered, and umpteen glued chicks, and a few total losses. I have never used a turner before, and always had wonderful hatches, but this time I had so many detached air cells it seemed to make more sense to put all of the eggs in a turner. Once I did, I had no room for water containers, and the wells underneath the turner would dry out, so I would let them be for a couple of days as it was so hard to fill them with the turner in place. Often throughout my Acurites read 16% humidity(I'm pretty sure that's the lowest reading possible on an Acurite). When I finally pulled out the turner for lockdown, the aircells were completely messed up. The rest is history. Your hatch sounds too much like mine, and I'm betting on humidity issues.