picked up a 125 yesterday that needs resealed. I don't have a problem with that. What concerns me is there is no center brace. The top frame doesn't look like there ever was one. I have older 55's and a 75 without center braces because they were made with much thicker glass than modern tanks. I was curious if 6ft tanks were done the same way many yrs ago. Not sure of the glass thickness but it is noticebly thicker than the brand new 125 in Petsmart.