I finished it today. Didn't do a build log, I got lazy. Its a 40 gallon breeder with house insulation painted black on the outside, a wood top, ceramic heat emitter, tube light, and a coco-husk/organic potting soil mix. Its a small cat box for his "pond." Here is his size now. He just woke up from a 3 week nap. And for a comparison, here is him, in the same bowl, the day I brought him home.