Humidity worries

[janus60]

Hi, I need advice on my humidity in my Covina super 24 incubator. I have 15 serama eggs fertile and growing out of the 30 I bought on eBay and online. I have been running dry at 18% humidity for last 2 weeks.

The room the incy is in is 40% natural humidity and centrally heated. On candling yesterday the 15 eggs were full of chick but the air sac didn't look very big. I have added water to the first tray (it has 2) and the humidity was 42% until someone said that 18% would shrink wrap them and they would not turn to hatch, and needed to up it to 65% and pray some might hatch.. At this I panicked and have added more water it is now at 63%

Would 18% have been okay till lockdown which will be middle of next week, should I take the water out, I have never used this incy before and have had DIS with all previous hatches in the other incubator which was a still air when running wet..
Always successful with a dry hatch but never used a forced air machine before

The Covina is forced air holding temp at 37.5 and semi automatic

Have I killed them all !!!

 

[janus60]

sorry double posted

 

[janus60]

Okay I think 63% is to high and have brought it down to 35%

 

[AmyLynn2374]

Hi, I need advice on my humidity in my Covina super 24 incubator. I have 15 serama eggs fertile and growing out of the 30 I bought on eBay and online. I have been running dry at 18% humidity for last 2 weeks.

The room the incy is in is 40% natural humidity and centrally heated. On candling yesterday the 15 eggs were full of chick but the air sac didn't look very big. I have added water to the first tray (it has 2) and the humidity was 42% until someone said that 18% would shrink wrap them and they would not turn to hatch, and needed to up it to 65% and pray some might hatch.. At this I panicked and have added more water it is now at 63%

Would 18% have been okay till lockdown which will be middle of next week, should I take the water out, I have never used this incy before and have had DIS with all previous hatches in the other incubator which was a still air when running wet..
Always successful with a dry hatch but never used a forced air machine before

The Covina is forced air holding temp at 37.5 and semi automatic

Have I killed them all !!!

First off, have you calibrated or checked your hygrometer? Because unless you have eggs with very thick non-porous shells 18% should have created too big, not too small. I agree 18% is dangerously low for the duration of the incubation. I only run completely dry if my bator stays above 25%, if it doesn't I add a wet sponge to maintain it around 30%. 63% is way too high during the first 17 days unless you have air cells that have become way too big and are trying to slow/stop loss of moisture. I'd even it out around 30%.