I've had a 10 gal local tank for 10 years. Its in the same room as my reef tanks...it only has electric heaters, so its cold all winter..(I keep my orchids in the room too..and the TV...we turn on the heat if we have to while in the room..) Temps range from 57-60 in winter, to 80's in summer. I used to keep fish...had a puffer for a year, but it was a pain in the butt...insatiable appetite, constant water changes with sky high nitrates. Now its invert only...with a big flat claw hermit, a mud crab, loads of mud snails and amphipods, slipper limpets, and a mussel that was accidentally left out of the pot last week.