I took one out of a 75 gallon once. Only reason was ..i needed to move it temporarily for some custoomization i was doing at the time. I just kept at it with and razor knife, dremmel.....finally i just whacked it with a hammer gently...and it broke in half...which made it alot easier to get out then. I replaced the center piece later after i was done with a new piece of glass the same size and thickness. Like they all said wouldnt advise taking it out at all....becuase its very hard to get out without messing up your tank...I was lucky. It does have to be there or it will bow like crazy.