I just got him from a friend for free. He said that he read that gravel was alright for substrate. I did some research and found out otherwise. It's probably the reason he hasn't ate in over a month.
He set up a false bottom with a water pump and put some goldfish in there. I really don't think that he can get to the goldfish ...
I'm going to redo his enclosure with some coco fiber. I don't want him to become impacted.
Not bad for everything being free. Prices are approximate:
Ten gallon: $10
Water pump: 15-$20
Heat pad: $25
False bottom setup: $15
Time to give his home a total makeover