Thank you very much for your answer! - It is a bit complicated, if you look at the picture below, the heating element is located at the very bottom of the box, under those gel-packs that i have placed in there:I have literally never heard of an incubator with a gel pack like that - you can use water bottles and such in an incubator as a heat sink, but placing eggs on top of a large gel pack that spans the whole incubator is a new one to me, lol.
Where is the heating element? In most incubators it's above the eggs, so the following advice is based on that.
Still air, the temperature should be 101.5 F measured at the tops of the eggs. Since there isn't air circulation, they are prone to hot and cold spots, so it's good to rotate the eggs around to different spots in the incubator when you turn them
The gel-packs were my idea, the incubator came with two plastic bags, made out of a rather thick foil. The instructions say to fill water in one bag, seal it by wrapping, then placing that water cushion into the second bag and put that on top of the heating element.
I thought replacing the water with a freezer gel-pack is a better solution because:
a. Less prone to leakage and flooding
b. Higher thermal mass compared to water
I like the idea of having the eggs in contact with a large thermal mass, in fact a hen, sitting on top of the eggs is nothing more than a thermal mass too. And the heat is transported from the hen to the egg through conduction not convection…