tank repair

I just recently bought a 220g tank that has a crack done the backglass. The past owner thinks it cracked because the top brace broke (broke at the front glass), but I think there was something pushing on the edge near the stand. Either way I am looking to either replace or repair the back glass...

Hey everyone, Im new to the site and wanted to bounce a few ideas and questions off yall. The tank I am working with has sustained some damage and I'm firstly wondering if its even worth the trouble to fix. If so, I was wondering what to do about the large crescent shaped break, can it be fixed...

I bought this tank a few weeks ago and have it up and running as a reef tank w/fish and inverts. It didn't cross my mind to repair it prior to filling because I was in a hurry to get the live stock back into the tank (purchased all together from a private seller). However, now it's starting to...