Tank bending outwards

[juhoonsi]

Hello! I recently set up a 105l/26g reef. And I haven’t noticed anything until today after I put some more rock in. The tank bends outwards and I’m kinda scared…is this normal or should I take it down and get a different one. The glass is 5milieters, also it’s a bit dirty but there’s no cracks, leaks and the silicone looks fine.

 

[salty joe]

how long is that span and how much is that bow? A tight string can help measure that.

 

[Gumbies R Us]

@Troylee

 

[Troylee]

Size of tank?