we don't have a hydrometer on either incubator, unfortunately. The chick that was peeping at me all night died ironically. The stuff bubbled up back around its beak last night and hardened. The other one that I was afraid wouldn't make it is alive, but there is so much stuff stuck around her wing and face it is gonna be extra hard for her to hatch, so we helped her a little. The turning racks in the incubator work very well, they gently sway the eggs slowly throughout the day, and it has a high hatch rate. We had to move these three eggs to another incubator. The eggs we are incubating have a scattered hatch date so we have to move them to another smaller incubator for hatching.