I picked up a 125 the other day. It is a older tank, not tempered glass
but because it is older it did not have a center brace. The glass is 5/8's inch but it does have a slight bow to it. should I worry about this and make a center brace and silicone it in or should I just let it go. I know they were designed this way before they started using thinner glass with the braces. I got the tank from the original owner and they never had any problems