x2.. always clear it with your landlord... I've read a few threads and known a few people who have had to get rid of their tanks or be evicted for having unauthorized tanks. and tbh I just never wanted to have to "hide" my tanks from the neighbors ect. because if something happens and your tank breaks and does major damage if you wheren't allowed a tank to begin with or it's not covered by insurance.. you are up a creek w/out a paddle... and imho that's a stupid risk to take.
But on that note, some people think i'm crazy for covering my butt that thoroughly.