im thinking of making my own custom tank to fit my wants for a long tank. i was thinking of something that is 12tall, 12 wide, and 6-8ft long. the gallons comes to about 45 for the 6ft, and 60 for the 8ft. now if you dont know already, i love tang fish, they are the best of the 3 lakes. what could i do with that much floor space in a tank? the 60g version is about 2x the floor space as a 55. i was thinking i could take multipul biotopes. with rocks taking 2 feet. shells taking 2 ft or so, and a 4ft sand feild for sandsifters. what all could i do with this large of a tank? ideas? suggestions?