Ah, its urates ... well, he has been drinking his water.

Thank you for the advice.

I got him 8 days ago now. I'll leave him alone to settle down, and continue cleaning his terrarium in an unobtrusive a manner as possible if you think that's alright. I didn't want him in a dirty environment, so if you don't think it would be too much for him if I spot clean the terrarium without directly handling him I'll do that, and I won't pick him up or anything.

I'll try to feed him again this-coming Thursday.

Thank you again.