My daughter has made a homemade incubator for a 4H project. She has used a 72 gallon fish tank. Puppy training pads line the bottom, fresh straw on top of that. Covered with cardboard on the top with a hole cut for the 250 watt brooder lamp. The temp went to 104 degrees directly under the lamp. So moved it to an end and are taking temp from opposite end of the aquarium. It is about 95 degrees at the opposite end. We wrapped the aquarium with tinfoil as well to try and stabilize the temp. We were looking for the temp of 100 degrees. Have any other ideas? We also played around with 100 watt bulb, but temp only went to 88 degrees. 200 watt took it to 95 degrees. We will let it set for the day, Any other ideas? Perhaps I should look for a slightly smaller lamp? and then reset it to the middle of the tank? Should the eggs be directly under the lamp? for a consistent temp? Thank you for any ideas you have. Sincerely Mary Ann and Annette.