My eggs have been in the incubator since March 9. I candled them on the 17th, and the developing ones all looked to be on schedule, from what I could tell. My little thermometer that came with the incubator has been hanging right in there at 99.5. No spikes, no dips. But then I got to reading last night, and someone mentioned using a fish tank thermometer. So, I stuck mine in the 'bator and it's reading about 96. How do I know which is right? Before I ever put the eggs in, I "calibrated" the little one the best way I could think of. I put it on the wall, right by the thermometer/thermostat for the house - it was dead-on. I'm hoping maybe the fishtank one is off. (It's almost 10 years old) My question is - would you up the temp by a degree or so?