They're always aquatic. The only reason they'd be living exclusively out of the water is if something was wrong with the water. It seems that since your newt is taking to the water again, though, that everything's fine now. I just felt I should let you know. Also, you didn't get rid of your terrestrial setup, did you? That's what it sounded like in your last post. You could always use it for some other terrestrial species, or you could just set it out as decoration for your house. It's a very pretty setup. It'd be a shame if you got rid of it. Either way, good luck with your newt! If you want tankmates for him, get more newts of his species.