Hope you are doing good.
I first tried styrofoam incubator few years back.
Built it with a w1209 controller, styrofoam, tape etc.
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Here is my incubation History:
1st time only one hatched (chicken). 2nd time 13 hatched. [3 died during hatching, 10 lived. Out of them, 3 survived Monitor Lizards, Kites, etc and reached adulthood.]
3rd time I tried duck eggs. Confident from 2nd hatching, I put 30 duck eggs. But sadly, none of them hatched. Almost all of them died before hatching. We were very disappointed.
I left home for my studies, and could not try any further. The incubator was neglected by family members and was pushed around in the house.
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Back to present time:
The main problem of incubation in my country (BD
) is, Electricity. Loads of Load-shedding. 
This time, I bought an UPS and replaced the battery with a larger one for longer backup.
4th incubation: Put 8 duck eggs on 28th of June, and 11 chicken eggs on 4th of July, so that they hatch at the same time.
+ Manual-turning, still-air, a 40-watt bulb.
+ Temp 37.7° C. (Return diff 0.5°C, meaning, heat source will activate when the temp is 37.2°C)
+ Room humidity almost around 80%.
+ Candled and discarded 5 eggs.
One duck egg was pipped at around 10:30 pm on 21st of July.
Reduced the temp to 37°. Humidity was around 55-60%. Put water to increase it, and then it reached to 75%. Stopped turning, locked down. Left for my workplace the next morning.
As I was informed, One chicken egg hatched in the morning of 23rd of July or the night before. 1st pipped duck egg hatched at around 11 am.
We have a brooding hen, who hatched just a day before. So, my mother put the incubator-hatched chicks and ducklings under the hen at night and surprisingly, she accepted them!
A total of 8 eggs hatched gradually as of 25th of July. 3 ducks and 5 chickens. The rest are discarded. So, the hatching rate is around 57% (8 out of 14).
I really expected better hatching rate this time, because of 24-hour power backup.
So, this has been my incubation and hatching journey thus far.
Do you have any suggestion for me?
Maybe you want to know something more? Let me know, I will try to update the post.
Thanks for your time. Have a good day.
Pictures + Update: July 28: Already 2 chicks died. Another one is in bad shape. I wonder if it was a mistake putting the chicks under the hen instead of brooding.
