I have 2 bators. A large styro forced air with auto turner. I use it for day 1-18. And yes I have a hydrometer, my temp & humidity are correct. Then I have a brinsea mini advance that I usually use for lockdown/hatch. The first several times I was getting small batches of shipped eggs, I had some infertile- some with funky air cells etc. I learned on here from Rox & Brooks to not turn the eggs for 7 days- which helped alot. Also now I order larger batches so I have a better chance. Problem is I didn't know certain things when I started, since then my hatches have been better. It's just sickening when I look back at all the wasted money!I'm sorry, that would be so hard! And I know what you mean about that stomach ache when you think about wasted money. What incubator do you have?![]()