its a 180, 6x2x2, and he defintely has room in there. and he really isnt being pestered, when hes in that corner like noone touches him, the odd time hes not cuz i try to get him to swim around by spooking him a bit (should i be doing that?) then the bass show interest but only the orino picks on him, and very mildly. so i think thats a small part of the stress, but the stress of coming from somewhere in brazil to an aquarium here and not knowing how to cope is what it is more than other tankmates, unless the sheer presence in size of the other fish is whats causing distress.