I agree as above, he really needs to be in a open top tortoise table. Vivs and glass tanks ar no good as they do not provide enough ventalation eventually leading to respiritory problems. Also they do not understand the concept of glass and keep trying to get through leading to stress.

I believe the soft shell is caused by a condition known as osteodystrophy caused by wrong lighting, an excess in protein and by an insufficant amount of calcium in the diet.
Is he on a weed diet, as the commercially bought food isn't really good for them. Good garden weeds include grass, dandelions, white clover and nettles