I got a 42qt cooler and a standing dish rack to set the egg tubs onto.
My first question is how do I run the heat tape cord through it? What tool can I use to make the hole?
And also, people have said that you can use water instead of vermiculite. If I were to do this then how would I set the cooler with the heat tape? Would I fill the bottom up with water and then put the heat tape around the sides above the water instead of along the bottom under bottles of water?
Then would I just put the eggs into a plastic tub my themselves, no substrate?