So I've read that you need to have about a 1/2" thickness of substrate or less when using an uth. If I'm planning on using Eco-Earth or the like, can I put about a 1/2" or less down where the uth is and then thicken the substrate where it's not? Kind of like a hill? Or would that be weird and I should just keep it 1/2" throughout the cage. :oops: Also, about uth, I put it on the side with the heat lamp, correct?