Reading all of this about Marans, I put 24 in the incubator and not one hatched. I thing it was due to a combination of things though. Now I have 15 more in the bater that i got from a different breeder and these are in a much better incubator. I am hoping to see a good hatch rate this time. 19 more days and i will know.
Good luck! Will be cheering you on. Go coco eggs go!