I used a Coleman cooler incubator with a VE 200 thermostat successfully for 3 clutches. These were 6-8 egg clutches in a 6 qt tub and I had zero issues with them. All the eggs hatched perfectly.

I ran into trouble with my 4th clutch, which was 10 eggs. I used a Zilla dial thermostat instead of the VE. Not sure if there were too many eggs in the tub or the Zilla was just not as precise enough, but I lost 9 of 10 eggs.



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