Accidental overdose?

[Adam Chandler]

Give him fresh, clean water from the tap.

It sort of sounds like your ball python is now used to his new environment, and is no longer stressed out and roaming around abnormally.

They aren't usually very active animals.

So, his hanging out in his hide all day is a good sign. It's what he is supposed to be doing. Now you can try offering him food.

Exactly, when you first got your BP he was trying to figure out his environment and was very active. Once he starts to feel conformable he will start to spend most of his day time sleeping like a normal BP.

I would also recommend trying to feed him. If you BP is eating and shedding in one piece that usually means you have a healthy BP.