The person I am getting him off of is giving me some hides and everything with the 40 gallon tank he is currently housed in but everyone agrees ot put him in the 20l instead of keeping him in the 40 correct? I have a brand new uth and a used one that came with the 20l I just traded for. is it best ot get a thermostat for the uth or just a rheostat and measure with a temp gun? Im going to look into the coco fiber, is that something I can just get and the pet store or is there a cheaper place? Should I get a piece of plexi than to cover up some of the mesh to help keep it humid?