i purchased another 125 gallon aquarium off ebay. i picked it up today and 2 things i noticed. 1 is its heavier then my other 125 and 2. there is no center brace in the middle of the tank.. its not like it was broke or anything cause the molding is the exact same in the middle as it is anywere else.. could this be normal for a real old tank?? maybe the glass is thicker and no need for the center brace in the newer tanks or whats the deal?? kinda afraid to fill it up until i get some awnsers.. thx for any help i can get..