Homemade Box. Used 1" extruded polystyrene board. I have a light that stays on constant and one on a thermostat right next to the fan. Using a temp. controller (slightly too sloppy IMO) but it stays within 1 degree. I hatched one other time in it. I had 3/7 hatch but 2 were clears. The birds that hatched came a day early so that told me my temps were too high. I did not have any kind of heat controller for that hatch either. I'll take some pics when i get batteries for the camera (every time I want to use it they're DEAD!) Hoping for more success this time though! Oh and quart ball jars filled with old holy socks (clean and rinsed) for wicks and to keep babies from jumping in the deep water (if they can get up there). It's not super great but most of the materials to make it I had just sitting around.You should get some wonderful layers out of that mix. Love to hear about good success with home made bators. More details please? What you using for a box, thermostat, heat source? Fan???