Quote Originally Posted by GrifTheGreat View Post
He doesn't actually need 5" of substrate depth to burrow. 3" 0r 3 1/2" is plenty even for an adult.
I think the more substrate provided, the better. I had an issue with my chubby frogs burrowing down and sitting on the bottom of their vivarium when there was only 3" of substrate, so I added another two bricks of plantation soil, making the substrate about 7" tall, and now they burrow down about 4" to sit in the semi-water logged soil area.