I am upgrading the 55 gal tank at the office to a 135(probable size of first pic)this weekend. My Jaguar Cichlid got too big, about 15 inches, so I have to upgrade. He sort of has to live alone, because he tends to kill and eat whatever I put in with him. It is a lot less work to keep up a freshwater tank. The one at the house is a 45 gal that fits nicely in a corner, biggest one in there is a 10 inch Jack Dempsey.