Someone out there must have done this.i have a 72 bow tank.i have a 250w m/h for the fish only tank.i was wondering if anybody has ever cut out the center plastic piece that runs from front to back of tank on the top.if i use my existing halide,there would be a large shady area in the center of the tank and my halide would sit fairly close to this piece.the heat would warp or melt it.i am on a budget and dont want to spend hundreds of bucks for a double halide system.I would replace the plastic with a thick piece of tempered glass.any info would help.thanks