Well I must have a serious issue with my bator. Either I have a defective bator or a nasty little bacteria in there. I set 32 of my own eggs, candled tonight on day 10. 4 were clear, 6 developing and 22 blood rings! Second hatch in a row with that had large number of eggs with blood spots or rings. I soaked the bator with bleach, scrubbed it, rinsed and let dry. Not sure what else to do.