I have a 55 gal tank it came with the 2 24 inch hoods instead of the 48 inch one....My question is is there anyway i can change this to the single 48 inch hood, cuz there is a light fixture i want and it only comes in 36 and 48 inches??? there is a metal brace in the middle of the aquarium by the way that doesn't seen like it's suppose to be removed