That's an empty tank! LOL
What kind of soil is that? I think it's far too wet for a toad. There's a possibilty he may get an infection living on such wet soil. Frogs can deal with soaked soil but toads need drier conditions.
I would suggest putting in lots of dried leaves to give a dry layer over top the soil. To prepare them pull them off a tree (in the woods or better from a fallen branch) and bake them in the oven for 1/2 an hour at 200*F (no hotter). Once they cool they will be crispy, scatter them around so the toad has some hiding spaces and dry places to be until the soil dries out a bit. If you have a screen lid to put over it it will help speed the drying out. Some small plants like ferns and other cheap houseplants and a branch or two wouldn't hurt either. They will make him feel more secure and give him even more places to hide and explore.