hey there check out stirctly balls. Mykee has a great incubator diy. i got my vermiculite at walmart they also had perlite if you want to do a mix. I taped my thermostat probe to the top of the incubator with 4/5 inches hanging down. I have my herpstat set at 87 to get 89.5 in my egg boxes. Good luck and hope you get lots of eggs.