i was thinking about hanging it off a side actually. i have a 55 going now, but in august when i move i'm going to make my 125 salt. so maybe a price on a 12"(it may need to be 11" to fit) and i believe my 125 is 18" (whatever the typical 6ft 125 sides are) i could use it behind my 55 until the move, then side it on the 125 after.